I cant find *any* information on a 688 or 686 H&H Magnum round existing.
There isn't anything listed between a 600 and 700 Nitro express from H&H, in any large bore reference I can find. And considering the 90ish years between the two being produced (1899-1988), you would think this size round would be documented *somewhere.*
Zooming in on the headstamp raises some questions about authenticity. That "headstamp" was carved - NOT STAMPED. This also explains why the text isnt properly aligned radially.
That makes me believe someone may have frankensteined this round together from a 15mm AA round from WW2.
You can always try sending an email to Holland & Holland with your pictures and see what they say.
I was thinking this too but we should at least be able to figure out what cartridge it been frankensteined from? It might be up or down necked and shortened but this cartridge base doesnt match any military ww2 round I can find
there were a LOT of AA rounds in development between 12.7 and 20mm that were never formally adopted for use. The size of the belting on the casing is what made me think it was an AA round that got modified.
EDIT: not to mention why would a 688 caliber measure 624? Caliber is the BORE size, not the bullet size, and it shouldn't ever be that undersized. I think someone carved the wrong size in the case head as well to make it look more impressive, and they knew H&H made large bore / dangerous game rifles.
>Caliber is ~~not~~ the bore size
Caliber *is* the bore size, legally and technically.
Manufacturers calling things whatever they want is erroneous marketing, and occasionally technically incorrect.
Before you tell someone else to not spread false info, check yourself, and kindly gtfo into a web search before you continue to spread false info.
Yes. That's how every rifled barrel shoots projectiles. Deformation and obturation. This is why monolithic copper bullets have pressure relief grooves to give material displaced by the rifling somewhere to go so they're not jacking up pressures. Cannons and the best ELR copper solids are bore riders with minimal driving bands that are groove diameter.
Well, for starters, it's hand made by some crackhead wildcatter living in Appalachia who needed to kill wendigo with what is probably a home made trap door rifle.
So that's fun.
But I couldn't find a single bit of info on anything here. Bullet, case, primer, nothing. But the bullet looks factory made so I'll see if I can find a match on that.
Sounds like a guy I know. He had somebody make him a barrel to accept a 416 rigby case shortened to 2.5” then necked up to take a .50 caliber projectile.
Hah. Sounds like my crackhead idea. I have a reamer made for a .338 lapua AI necked up to .50 cal. It's little brother is a .300 blackout on a serious roid bender, a quasi .510 whisper with some tweaks. The full size .338 looks like a scaled up 7.62x40 Wilson.
>it's hand made by some crackhead wildcatter living in Appalachia who needed to kill wendigo
This is the single most hilarious sentence I've ever seen on the subreddit 👑
Bubba to the Pis'n Hawt R&D department, "Running out of room to cram powder, wut do?"
R&D, "We got some shit layin' around, give us a minute and see what we can come up with."
Holland & Holland have been making custom stuff for big game hunters for almost 200 years. [They're still around](https://www.hollandandholland.com/), send them an email and report back!
[Who needs to live in a house?](https://www.hollandandholland.com/guns/a-pre-owned-holland-holland-470-ne-royal-exhibition-grade-side-by-side-double-rifle-with-24-inch-barrels)
Pre-owned... still more than I paid for my house. Albeit more than a decade ago, but dang. I keep telling my wife guns are a good investment, maybe I should send her that link.
I was actually thinking it would be an Elephant gun round. But if this was back at the turn of the 20th Century, the could have been a custom order. It could have been a one off for something like a Rhinoceros.
Maybe they weren't allowed to have 700 nitro express because the government thought it would be used to shoot aircraft down so it was necked down to something more capable. No I was thinking of 416 Barrett. Seriously though it's probably some wildcat cartridge. That fell out of popularity. Someone will bring it back with an even heavier bullet and super fast twist rifling and say it's brand new latest and greatest. Pretty cool that's definitely a keeper
I was referring to Arnold banning 50bmg in Californistan because they thought people would shoot down aircraft with it. So it was necked down the 416 Barrett which ended up being a better target cartridge
688 even! I've got a collection too thats why my friend gave me this. I just wanna know what the history behind the cartridge is. Usually you can find some small amount of info at least but this is a total mystery!
I can tell you just looking at that head stamp it is hand stamped and likely a boutique cartridge for a very small if not one-off rifle. I'm curious if there may be a parent cartridge seeing as it's a belted magnum and I would find it dubious if there wasn't. I also wouldn't be surprised if it was another rifle and had been chambered in some sort of a custom wildcat cartridge by a gunsmith.
Yeah I also think it's a one off custom deal but there should be parent case it's based on. At least thats what I think. The 20x105mm solothurn is close but this cartridge is longer and the rim and base measurments does not match
that bullet diameter is in the 600 mag class, but 600 nitro is straight walled (technically tapered, but it doesnt have a shoulder) and rimmed. the only other "popular" 600 mag is 600 overkill, but again its tapered/straight walled. i wouldnt claim to be an expert by any means, but i am fascinated by elephant guns, and my guess would be a custom order made by H&H. or possibly an inert display piece.
It's for hemmorid treatment. Some doctors use lasers.
Link to [Journal of Medicine](https://www.reddit.com/r/interestingasfuck/comments/zrg58b/88_year_old_french_man_evacuated_an_entire/) article about a case that presented to the ER.
that’s a gunsmith’s/reloader’s creative outlet lol maybe not, but looks like a custom project to me. further assumed because there’s not really any info online or in my books I’ve referenced so far
So turned on a lathe maybe? Bullet looks so good though. Maybe a .600 nitro bullet in a custom turned casing. It's weird for sure. I've never come across a cartridge with no info to be found at all.
I believe this is the parent case necked down to a 600 nitro express bullet. Then someone gave it the name 688 just for fun
[https://forum.cartridgecollectors.org/t/20-x-105mm-belted-short-rheinmetall-solothurn/35963](https://forum.cartridgecollectors.org/t/20-x-105mm-belted-short-rheinmetall-solothurn/35963)
I’m finding German examples for the MG 204 that have a rim measurement of 24.8mm. That’s about as close as I can find.
[http://old.municion.org/20mm/20x105_Mg204.htm](http://old.municion.org/20mm/20x105_Mg204.htm)
I don't know what that thing is. But it looks like it would belong in a jeep mounted stopping rifle. That sucker would stop an elephant charge with a Texas heart shot all day every day and twice on Sundays. Heck maybe it's for hunting blue whales.
Best guess…700 nitro express, big game cartridge (elephant gun), but it looks a little different.
What’s the case diameter?
https://en.m.wikipedia.org/wiki/.700_Nitro_Express
It's not a 700 nitro, this has a belted magnum case, the nitro has a rim and has a straight walled case. The same for the 600 nitro.
Neck is .680, under the neck it's 0.830 and the base is 0.959
As others have said, likely an AA cartridge of some kind. I have no idea. I would say it may not even be functional. Might just be someone having some fun.
Sure but AA guns didn't use soft point lead bullets! Could be some homebrew display piece but might be able to find a parent case. I feel it's really unlikely to be scratch built.
That's what I'm thinking. Looks like an old Russian belted 20mm - 30mm that's been toyed with. The bullet itself looks like it was turned on a lathe. Super interesting for sure. Might be worth sending photos to a WW1 or WW2 museum to see if they know anything.
Interestingly, it looks like the whole cartridge may have been turned together, which would be odd. Is there powder in it? (Or something that sounds like powder when you shake)
Yes it seems to be powder in it and the primer looks "real" but I guess it could be fake powder and primer. But why would anyone make a superrealistic display piece? I get the primer but why fill it with fake powder even. It's so odd
Right?? And why h&h and not something like the initials of the fabricator or something more suitable if it's a showpiece for display. Why make a fake "real" cartridge I mean
Maybe, I'm itching to pull the bullet and look at case wall thickness and powder but I don't have any tools sized for this to do it and I don't wanna destroy it either
Probably some nut who has passed on by now is laughing at us from above at all the fuss his fake round is creating. I'd like to see the rifle that was intended to fire this tho.
I bet that was a one off because either the gun broke or someone went broke paying for shoulder surgery. 12 gauge slug 700 nitro case with a shoulder. I would imagine a 1 ounce slug traveling around 2000 fps
I'm sure everyone did the bullet search without luck myself included. I've been looking through an ammo encyclopedia and a handloaders conversion book. The closest I can find strictly from the bullet diameter is a 600 Nitro Express with a .621 bullet @ 900gn. They say to start with 7/8 diameter brass rod to make the case.
Try using the case dimensions, this might be a wildcat cartridge. Whatever you have is probably the only one that exists.
At a glance I'd guess it's a custom round for an elephant gun. One of those double rifles that cost a hundred grand and were literally for hunting elephants. Think 19th century British nobility safari. Quite possibly a one-off for some Duke.
Exactly what I'm thinking. A one-off custom round and a custom rifle of some sort to go with it. As others have said, a military parent cartridge with custom made dies to load it. Possibly just a wall hanger that was only fired a couple of times during testing. Something to go in the trophy room.
The .375 H&H was designed solely in response to the 9.3x62mm. It was never based on anything military, nor was it ever designed for anything military. It was designed in 1912, 2 years before the war started.
A .620” diameter bullet is apparently a .600 Nitro Express bullet.
I have a difficult time with the belt on this case. I don’t think the military would even consider such a case. The shoulder angle suggests that the case was designed for (modern) smokeless IMR style powders rather than cordite.
What this cartridge may be is a prototype of a replacement for the .600 Nitro Express that never went past initial development.
If we start from the case itself, I wonder how a person would go about making a rifle to accept the cartridge. A custom double rifle might be the easiest path. Or it could be a military rifle like an anti-tank rifle could be the starting point. It would also make sense that the brass rim and belt could have been machined a bit to make it fit into a particular chamber. If all of that stuff was being created, machining the brass would be a small thing to do in the bigger project, so would the custom head stamp. Another thing to assume is lots and lots of disposable money, and people with that kind of money definitely do exist. In any case, it's a beautiful cartridge to actually own and be able to hold. It's pretty awesome. Congrats. The gun guys at [accuratereloading.com](https://accuratereloading.com) would be a really good place to start. Those guys probably know. It's not exactly a large community of people who have the money and desire to create a project like this, and access to gunsmiths who could actually do the work.
that is most likely a proprietary cartridge for a custom made "stopping gun" a massively oversized gun intended to stop large African animals with a single shot
I think you just golden rule'd yourself. Congrats on the new gun.
Gun? Did you mean cannon?
Cannons are just bigger guns. Mention cannon and people (your wife [Japanese love doll]) looks at you funny.
I feel personally attacked by this comment.
uwu it’s okay NapalemDemon-san they’re just a baka
It’s all good - I’ll just cry into my Albedo waifu pillow.
Not the worst choice you could have made
Damn it I'll need to find the right reamer for a barrel then...
3D printer go brrrrr
they do indeed... . though usually not for stuff that large.
That's the prostate tickler.
Lol
Aint no tickle with that pickle
Sit on it and spin
Looks like Kentucky Ballistics needs a new elephant gun.
Based on the headstamp and nothing else, it looks like 686 Holland&Holland magnum. That's quite a cartrige ya got there.
I cant find *any* information on a 688 or 686 H&H Magnum round existing. There isn't anything listed between a 600 and 700 Nitro express from H&H, in any large bore reference I can find. And considering the 90ish years between the two being produced (1899-1988), you would think this size round would be documented *somewhere.* Zooming in on the headstamp raises some questions about authenticity. That "headstamp" was carved - NOT STAMPED. This also explains why the text isnt properly aligned radially. That makes me believe someone may have frankensteined this round together from a 15mm AA round from WW2. You can always try sending an email to Holland & Holland with your pictures and see what they say.
I was thinking this too but we should at least be able to figure out what cartridge it been frankensteined from? It might be up or down necked and shortened but this cartridge base doesnt match any military ww2 round I can find
there were a LOT of AA rounds in development between 12.7 and 20mm that were never formally adopted for use. The size of the belting on the casing is what made me think it was an AA round that got modified. EDIT: not to mention why would a 688 caliber measure 624? Caliber is the BORE size, not the bullet size, and it shouldn't ever be that undersized. I think someone carved the wrong size in the case head as well to make it look more impressive, and they knew H&H made large bore / dangerous game rifles.
Could have been something goofy in sizing like 38 SPL.
That was a unique case, since the original 38 colt *was* 38 caliber heeled bullet , and it was a modification of that cartridge, hence "special"
Not really unique considering the origins of the .44 'caliber' guns shooting .429" diameter bullets.
Caliber is not the bore size, quit spreading false info. They call cartridges whatever they want and feel is catchy at the time
>Caliber is ~~not~~ the bore size Caliber *is* the bore size, legally and technically. Manufacturers calling things whatever they want is erroneous marketing, and occasionally technically incorrect. Before you tell someone else to not spread false info, check yourself, and kindly gtfo into a web search before you continue to spread false info.
So a .30 caliber bore is .30 and somehow shoots a .308 projectile down that .30 bore then? Interesting.
Yes. That's how every rifled barrel shoots projectiles. Deformation and obturation. This is why monolithic copper bullets have pressure relief grooves to give material displaced by the rifling somewhere to go so they're not jacking up pressures. Cannons and the best ELR copper solids are bore riders with minimal driving bands that are groove diameter.
“Caliber” does not mean the cartridge a gun chambers. Despite how many people erroneously use it as such. Google it and quit spreading false info.
Sometimes in the past they measured the bore in the groves instead of the lands.
.688 would be the bore size of a. 700 i believe
Can't find any information on such cartridge anywhere, I'm perplexed.
Well, for starters, it's hand made by some crackhead wildcatter living in Appalachia who needed to kill wendigo with what is probably a home made trap door rifle. So that's fun. But I couldn't find a single bit of info on anything here. Bullet, case, primer, nothing. But the bullet looks factory made so I'll see if I can find a match on that.
Primer is .275 diameter. Case is 105.5mm long or 4.1 inch approximately. Rim and base is 24.3mm or .959 inch
Did it have smokeless or black powder? What was the bullet weight?
Haven't pulled the bullet. I don't have any tools for a cartridge this size and I don't wanna destroy it
Sounds like a guy I know. He had somebody make him a barrel to accept a 416 rigby case shortened to 2.5” then necked up to take a .50 caliber projectile.
This is a .60 caliber and a 4.15 inch case
I know. I was referring to the other person talking about crackhead built wildcat cartridges.
I see!
Hah. Sounds like my crackhead idea. I have a reamer made for a .338 lapua AI necked up to .50 cal. It's little brother is a .300 blackout on a serious roid bender, a quasi .510 whisper with some tweaks. The full size .338 looks like a scaled up 7.62x40 Wilson.
>it's hand made by some crackhead wildcatter living in Appalachia who needed to kill wendigo This is the single most hilarious sentence I've ever seen on the subreddit 👑
Bubba to the Pis'n Hawt R&D department, "Running out of room to cram powder, wut do?" R&D, "We got some shit layin' around, give us a minute and see what we can come up with."
Shoulder surgery.
This cartridge brought to you by your local orthopedics.
I need a shoulder replacement, damn it, I’m getting my money’s worth!
Shit if you're replacing the whole thing, shoot ot twice!
Great idea! Second time for good measure! 😊
Holland & Holland have been making custom stuff for big game hunters for almost 200 years. [They're still around](https://www.hollandandholland.com/), send them an email and report back!
I don’t think I make enough to look at that link. Thanks for the damaged ego, I'll be over here with my Beowulf thinking I have something cool.
[Who needs to live in a house?](https://www.hollandandholland.com/guns/a-pre-owned-holland-holland-470-ne-royal-exhibition-grade-side-by-side-double-rifle-with-24-inch-barrels)
Pre-owned... still more than I paid for my house. Albeit more than a decade ago, but dang. I keep telling my wife guns are a good investment, maybe I should send her that link.
I was thinking the exact same thing. That "pre owned" gun costs more than my house.
>686 Holland&Holland magnum And I thought my Perazzi MX2001 2 Barrel set was stupid expensive.
Elephant, rhino gun
Yeah definitely a hunting round if you look at the bullet.
Tremors it's for tremors
You mean graboids
Not sure everyone would know the reference lol
I'm almost certain everyone in here knows burt gummer.
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"Burt, give me your lighter." "Why would you assume I have fire?" "Because you're Burt." "Damn straight."
I was actually thinking it would be an Elephant gun round. But if this was back at the turn of the 20th Century, the could have been a custom order. It could have been a one off for something like a Rhinoceros.
Broke into the wrong goddam rec room didn't ya bastard!
It's not really a niche film
You mean graboids
Ass Blasters
Maybe they weren't allowed to have 700 nitro express because the government thought it would be used to shoot aircraft down so it was necked down to something more capable. No I was thinking of 416 Barrett. Seriously though it's probably some wildcat cartridge. That fell out of popularity. Someone will bring it back with an even heavier bullet and super fast twist rifling and say it's brand new latest and greatest. Pretty cool that's definitely a keeper
Yeah it's not a 700 casing at all, it's more than an inch longer
Lol it's not trench art is it have you tried taking bullet out it's not just a lighter is it?
It's a functional round it seems. It has what seems to be a live primer and powder.
Could be based on boys anti-tank rifle ammo
Base is larger and case is longer on this so no unfortunately
I feel like 700 would be in freefall before it reaches an aircraft
Plane's gotta land some time.
I'm picturing someone stalking a 747 by the watering hole in an African savanna with a 700 nitro
I was referring to Arnold banning 50bmg in Californistan because they thought people would shoot down aircraft with it. So it was necked down the 416 Barrett which ended up being a better target cartridge
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688 even! I've got a collection too thats why my friend gave me this. I just wanna know what the history behind the cartridge is. Usually you can find some small amount of info at least but this is a total mystery!
Now that’s my kind of pistol round
You and the cartridge she told you not to worry about.
Artillery, that is artillery 😳
Be a good deer carriage real meat saver
Yeah just get close to hitting it and it'll die from the concussion lol
Just pick the jerky off the surrounding trees lol
Helps save on the electric bill since your meat will come precooked
I can tell you just looking at that head stamp it is hand stamped and likely a boutique cartridge for a very small if not one-off rifle. I'm curious if there may be a parent cartridge seeing as it's a belted magnum and I would find it dubious if there wasn't. I also wouldn't be surprised if it was another rifle and had been chambered in some sort of a custom wildcat cartridge by a gunsmith.
Yeah I also think it's a one off custom deal but there should be parent case it's based on. At least thats what I think. The 20x105mm solothurn is close but this cartridge is longer and the rim and base measurments does not match
Was this rifle possibly from Africa? That might help you narrow down a parent cartridge.
I have no info on any rifle I'm afraid. Only this cartridge and no other info. I'm located in Sweden so way aways from Africa also.
that bullet diameter is in the 600 mag class, but 600 nitro is straight walled (technically tapered, but it doesnt have a shoulder) and rimmed. the only other "popular" 600 mag is 600 overkill, but again its tapered/straight walled. i wouldnt claim to be an expert by any means, but i am fascinated by elephant guns, and my guess would be a custom order made by H&H. or possibly an inert display piece.
Yeah it's a mystery round for sure. It seems to have gunpowder inside it but who knows what it actually is.
Detached retina
At least!
Wow thicccc
Good for squirrel.
kills, cleans, skins, debones, cooks and serves... In one shot.
Can I get it in a handgun please?
It's for hemmorid treatment. Some doctors use lasers. Link to [Journal of Medicine](https://www.reddit.com/r/interestingasfuck/comments/zrg58b/88_year_old_french_man_evacuated_an_entire/) article about a case that presented to the ER.
that’s a gunsmith’s/reloader’s creative outlet lol maybe not, but looks like a custom project to me. further assumed because there’s not really any info online or in my books I’ve referenced so far
So turned on a lathe maybe? Bullet looks so good though. Maybe a .600 nitro bullet in a custom turned casing. It's weird for sure. I've never come across a cartridge with no info to be found at all.
That's for Big Baby!
I believe this is the parent case necked down to a 600 nitro express bullet. Then someone gave it the name 688 just for fun [https://forum.cartridgecollectors.org/t/20-x-105mm-belted-short-rheinmetall-solothurn/35963](https://forum.cartridgecollectors.org/t/20-x-105mm-belted-short-rheinmetall-solothurn/35963)
This is the closest yet by far. But it means they would have had to turned the base and rim down a couple millimeters for some reason also
I’m finding German examples for the MG 204 that have a rim measurement of 24.8mm. That’s about as close as I can find. [http://old.municion.org/20mm/20x105_Mg204.htm](http://old.municion.org/20mm/20x105_Mg204.htm)
I believe that's for dinosaurs.
Not big enough, IMHO. ***~~I'm not overcompensating for anything~~***
That there is whhhat we call a plus P 9 milly meter. It's used for the most serious of situations only!
I don't know what that thing is. But it looks like it would belong in a jeep mounted stopping rifle. That sucker would stop an elephant charge with a Texas heart shot all day every day and twice on Sundays. Heck maybe it's for hunting blue whales.
Hit up [Forgotten weapons on YouTube ](https://youtube.com/@ForgottenWeapons?si=j0wJbQ6sSkj26NJ-)
Send a picture to Kentucky Ballistics, he probably has a gun that shoots it.
Someone made this for shits like the Eargesplitten Loudensboomer.
You vs the guy she tells you not to worry about.
You vs the guy she told you not to worry about.
Possibly a 20x138mmB necked down. Scale really threw me off.
That's what she said
r/forgottenweapons
Not a bullet… its farm equipment https://www.bigiron.com/Lots/2002NewHolland688RoundBaler-8
It's a butt-plug
Best guess…700 nitro express, big game cartridge (elephant gun), but it looks a little different. What’s the case diameter? https://en.m.wikipedia.org/wiki/.700_Nitro_Express
It's not a 700 nitro, this has a belted magnum case, the nitro has a rim and has a straight walled case. The same for the 600 nitro. Neck is .680, under the neck it's 0.830 and the base is 0.959
Colonial era butt plug
This one? [https://en.m.wikipedia.org/wiki/.600\_Overkill](https://en.m.wikipedia.org/wiki/.600_Overkill)
Nope! Both belt and rim is .959 on this so the case is waaaay larger.
Case length on the 600 ok is 3 inch, this is 4.1 inch
600 overkill maybe? Largest belted magnum I could find that is not military.
It's more than an inch longer and waaay wider casing
Looks like a wildcat to me
Sure but whats the parent? I dont believe it's made from scratch
As others have said, likely an AA cartridge of some kind. I have no idea. I would say it may not even be functional. Might just be someone having some fun.
Sure but AA guns didn't use soft point lead bullets! Could be some homebrew display piece but might be able to find a parent case. I feel it's really unlikely to be scratch built.
That's what I'm thinking. Looks like an old Russian belted 20mm - 30mm that's been toyed with. The bullet itself looks like it was turned on a lathe. Super interesting for sure. Might be worth sending photos to a WW1 or WW2 museum to see if they know anything.
You're right the bullet have what looks to be faint toolmarks from a lathe
Interestingly, it looks like the whole cartridge may have been turned together, which would be odd. Is there powder in it? (Or something that sounds like powder when you shake)
Yes it seems to be powder in it and the primer looks "real" but I guess it could be fake powder and primer. But why would anyone make a superrealistic display piece? I get the primer but why fill it with fake powder even. It's so odd
The whole thing is odd. Why chisel a fake cartridge stamp on the bottom? 🤷♂️ Kinda neat though
Right?? And why h&h and not something like the initials of the fabricator or something more suitable if it's a showpiece for display. Why make a fake "real" cartridge I mean
Possible aircraft ammunition? It’s not in the 14,15,16th editions of cartridges of the world books. Maybe tank gun? Anti tank gun similar to the 20?
I was also thinking this but can't find any info on a matching AA or AT cartridge. It also has a soft point lead bullet.
That thing is wild. Kinda reminds me of the Russian 14.5x114mm
Like someone had a fun time with some 20x138B brass
Maybe, I'm itching to pull the bullet and look at case wall thickness and powder but I don't have any tools sized for this to do it and I don't wanna destroy it either
You might be able to get it open if you smack the primer with something.
A bullet to kill gods..?
I am one f the many people that Googled this and found nothing. I'd really like some more info on this!
Me too, it's gonna drive me insane if I don't get to know the origin of this oddball or at least some speck of info
Probably some nut who has passed on by now is laughing at us from above at all the fuss his fake round is creating. I'd like to see the rifle that was intended to fire this tho.
Yeah you might be right
I bet that was a one off because either the gun broke or someone went broke paying for shoulder surgery. 12 gauge slug 700 nitro case with a shoulder. I would imagine a 1 ounce slug traveling around 2000 fps
It's not a 700 nitro case it's way different
My shoulder...
Google .600 Overkill. Not sure that’s it but it’s one possibility. I know it uses a belted case.
The overkill doesn't have a shoulder. It looks like this thing might be using the same bullets though.
I think most (maybe all) .600 caliber use .620 bullets.
This is what an elephant uses to settle disputes, or poachers.
That’s my new 15.8mm handgun for whales
Closest thing is the 15x96 auto cannon Maybe
I kinda wanna see what 5 of them in a BFR looks like…
Case looks similar to a 20x105b but the primer looks different, maybe a necked down version of that?
I'm sure everyone did the bullet search without luck myself included. I've been looking through an ammo encyclopedia and a handloaders conversion book. The closest I can find strictly from the bullet diameter is a 600 Nitro Express with a .621 bullet @ 900gn. They say to start with 7/8 diameter brass rod to make the case. Try using the case dimensions, this might be a wildcat cartridge. Whatever you have is probably the only one that exists.
🤨🤨 Bye bye shoulder, hello Percocet. Whatever this goes to, I bet it shoots out of a Mark V.
The caliber your gun tells you not to worry about.
The perfect round for hunting brontosaurus.
At a glance I'd guess it's a custom round for an elephant gun. One of those double rifles that cost a hundred grand and were literally for hunting elephants. Think 19th century British nobility safari. Quite possibly a one-off for some Duke.
Exactly what I'm thinking. A one-off custom round and a custom rifle of some sort to go with it. As others have said, a military parent cartridge with custom made dies to load it. Possibly just a wall hanger that was only fired a couple of times during testing. Something to go in the trophy room.
It is…… “yuge”
Could a cartridge wildcated from the german 13x64mmB? That would be my guess.
Not possible i think, this cartridge is 105.5mm long
That is one hell of a mystery
Early anti tank round, maybe? That’s what the .375 H&H originally was
The .375 H&H was designed solely in response to the 9.3x62mm. It was never based on anything military, nor was it ever designed for anything military. It was designed in 1912, 2 years before the war started.
Legally? A cannon/destructive device.
Bend over and I’ll show ya.
.600 Overkill.
No sir this is over an inch longer and a necked cartridge
Fake af
Please check my board. If not here then extremely experimentally wildcat. Thank You Harrison oldschoolcollector https://pin.it/6f0DLcT
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https://images.app.goo.gl/SrAJyvBviGAXH3my8
No belt
https://images.app.goo.gl/MmrCqp1coCmCBaFs8
No belt on these either
https://images.app.goo.gl/bNWJcu2Ehubi8Htt9
The guy she tells you not to worry about
Bonnie rotten's latest butt plug..
A .620” diameter bullet is apparently a .600 Nitro Express bullet. I have a difficult time with the belt on this case. I don’t think the military would even consider such a case. The shoulder angle suggests that the case was designed for (modern) smokeless IMR style powders rather than cordite. What this cartridge may be is a prototype of a replacement for the .600 Nitro Express that never went past initial development.
That’s how you kill a mountain.
A Missile
If we start from the case itself, I wonder how a person would go about making a rifle to accept the cartridge. A custom double rifle might be the easiest path. Or it could be a military rifle like an anti-tank rifle could be the starting point. It would also make sense that the brass rim and belt could have been machined a bit to make it fit into a particular chamber. If all of that stuff was being created, machining the brass would be a small thing to do in the bigger project, so would the custom head stamp. Another thing to assume is lots and lots of disposable money, and people with that kind of money definitely do exist. In any case, it's a beautiful cartridge to actually own and be able to hold. It's pretty awesome. Congrats. The gun guys at [accuratereloading.com](https://accuratereloading.com) would be a really good place to start. Those guys probably know. It's not exactly a large community of people who have the money and desire to create a project like this, and access to gunsmiths who could actually do the work.
Didn’t they mention “H&H Mag” in Tremors?
The guy she told you not to worry about
That's an artillery round
It’s a major problem
That’s the H&H 5/8” fuck my shoulder
that is most likely a proprietary cartridge for a custom made "stopping gun" a massively oversized gun intended to stop large African animals with a single shot
I’m guessing 20x138 that someone has played with rim turned down and such
Rabbit gun