any stats on the balistic profile of 9mm and 8mm mauser? the worst thing that could happen here would be failure to extract... maybe... and I mean really reloading MP38/40 with a stripper clip...
any stats on the balistic profile of 9mm and 8mm mauser? the worst thing that could happen here would be failure to extract... maybe... and I mean really reloading MP38/40 with a stripper clip...
Extraction failure is the least of your problems if the gun blows up in your face which is what'll happen if you put 7.92 in a gun meant to fire 9mm.
any stats on the balistic profile of 9mm and 8mm mauser? the worst thing that could happen here would be failure to extract... maybe... and I mean really reloading MP38/40 with a stripper clip...
From a quick wiki look, assuming this means anything:
9x19 parabellum: C.I.P.: 235.00 MPa (34,084 psi)
8mm mauser: C.I.P.: 390.0 MPa (56,560 psi)
The SAAMI also lists unsafe guns/ammo combinations, so it shows that even with the same caliber, it is always a good idea to know what your Firearm was designed for.
any stats on the balistic profile of 9mm and 8mm mauser? the worst thing that could happen here would be failure to extract... maybe... and I mean really reloading MP38/40 with a stripper clip...
First you would have to solve the geometric issue. 8mm rounds are a lot larger than in the picture and you can't fit clipped rounds into the chamber of a 9mm gun. 8mm refers to the bullet diameter and while that is smaller than 9mm, the case head (rear of cartridge) is closer to about half an inch which is larger than 9mm (~0.355" plus or minus a few thou). If a round does go off in this kind of gun it would be with the case sticking out of the chamber of the barrel. I'm not familiar with the MP40 as I have never taken one apart or studied it, but I believe it has a fixed firing pin. This is the only way it would allow the round to go off when not chambered. You would have to wedge the shoulder of the cartridge in the chamber. A gun is powerful because it focuses the expanding gases from combustion of gunpowder down a small area (the barrel). Outside of the chamber, a fired cartridge simply ruptures on the side of the case which is basically just sheet metal. This produces an effect similar to a firecracker with usually no fragmentation. Depending on how the cartridge is supported when fired, the bullet or primer may separate but only fly as strongly as if you tossed it by hand.
Professionally made barrels tend to be made of fairly uniform strength. You can take a 9mm barrel blank (which is a barrel not turned down to its final dimension and is jut a thick rod with a rifled bore) and chamber it for 8mm and as long as the barrel profile around the chamber is thick enough to match a normal 8mm chambered barrel, there is little reason it would explode or do anything catastrophic. For example, I have on occasion taken 30 caliber barrel blanks that were designed for 7.62x25 or 32ACP pistols/smg and rechambered them for 7.62x35 (300 blk) or 7.62x51 (308) and didn't have issues. I've also successfully taken 9mm barrel blanks and rechambered them for 9x39, but 9x39 is less of a rifle powered cartridge and more of a supersized 45ACP when you get down to it.
First you would have to solve the geometric issue. 8mm rounds are a lot larger than in the picture and you can't fit clipped rounds into the chamber of a 9mm gun. 8mm refers to the bullet diameter and while that is smaller than 9mm, the case head (rear of cartridge) is closer to about half an inch which is larger than 9mm (~0.355" plus or minus a few thou). If a round does go off in this kind of gun it would be with the case sticking out of the chamber of the barrel. I'm not familiar with the MP40 as I have never taken one apart or studied it, but I believe it has a fixed firing pin. This is the only way it would allow the round to go off when not chambered. You would have to wedge the shoulder of the cartridge in the chamber. A gun is powerful because it focuses the expanding gases from combustion of gunpowder down a small area (the barrel). Outside of the chamber, a fired cartridge simply ruptures on the side of the case which is basically just sheet metal. This produces an effect similar to a firecracker with usually no fragmentation. Depending on how the cartridge is supported when fired, the bullet or primer may separate but only fly as strongly as if you tossed it by hand.
Professionally made barrels tend to be made of fairly uniform strength. You can take a 9mm barrel blank (which is a barrel not turned down to its final dimension and is jut a thick rod with a rifled bore) and chamber it for 8mm and as long as the barrel profile around the chamber is thick enough to match a normal 8mm chambered barrel, there is little reason it would explode or do anything catastrophic. For example, I have on occasion taken 30 caliber barrel blanks that were designed for 7.62x25 or 32ACP pistols/smg and rechambered them for 7.62x35 (300 blk) or 7.62x51 (308) and didn't have issues. I've also successfully taken 9mm barrel blanks and rechambered them for 9x39, but 9x39 is less of a rifle powered cartridge and more of a supersized 45ACP when you get down to it.
ok I would assume the 8mm would actually fit since its "smaller" but not sure if the case or the projectile is even a spitzer type is longer and technically speaking the MP40 doesnt have a fixed firing pin its actually attached on the recoil spring which is a telescopic tube like "thing"... dont ask me why, ask german engineering. even in a war they still like their guns to be as complicated as a G11 trigger group can be made
