imported post
I know that .357 revolvers can fire .38 ammo, and I was curious if other firearms had some similar crossovers, especially auto-loaders.
Could a 10MM auto chamber, fire, and rechamber a .40 reliably?
It may chamber and fire a .40 S&W, but i think that may only happen once. it would force the bullet to be make a jump from the chamber to the rifling and would most likely get stuck in the barrel waiting for that next round to make the gun come apart from an obstructed barrel.
Could a .22LR auto use .22 short?
Most definitely, but a semi-auto may have feed & eject problems, but bolt or single action would no be any problem at all, You may need to load rounds individually though instead of filling the magazine. Sub-sonic, .22 BB, CB, & shorts, rounds are nice and quiet and a stealthy back-yard varmint round without disturbing the neighbors. best in a single-shot or bolt action gun.
Could a .357 Sig auto use .38 ammo?
No, the case of a .357 Sig is a larger diameter than .38 or .357, and necked down like a rifle cartridge to hold the projectile. a .38 cartridge is noticeably thinner in diameter. the .357 sig is a .40 case necked down to hold a .38 DIA bullet.
Lets look at some similar rifle rounds that could be wrongly fed into a gun, a .308 cartridge is the same diameter, same projectile, but shorter than a 30-06 round. I believe it is just a shortened version of the 30-06 brass and fully derived from it so a 30-06 should chamber it, I do not know if it would fire it though.
The 22-250 is a .308 cartridgenecked down to accept a .224 diameterprojectile, which again is very similar to the 30-06 cartridge and would probably feed into and the firing pin would fire itfrom a .308 or a 30-06 rifle. then we get into the 22-250 ackley, or ackley improved, they would feed into one another and the firing pin would hit the primer, but from that point on, it would get ugly. I think the 6mm PPC is also real close (mostly match rifles in the .224 or 6mm caliber)
Taurus has their .45 long coltrevolver that is designed to accept & fire .410 shells.
A 45-70 Gov revolver or rifle will chamber a .45 ACP or long colt round, but I think it would end there.
I am not stating that all the things I brought up could or should be used as a crossover ammunition, just that the firearm may chamber a similar round and would "most likely" end with catastrophic results if they were to be fired or the bullet would bounce around in the barrel and the projectile would tumble downrange.
