The mechanics of a .38/.357 Mag are quite different than the 9mm/.380 auto loaders. The .38 is simply a shorter case, which doesn't matter much in a revolver. But length of case DOES matter in a magazine fed auto-loader. It's why the Nagant revolver can fire THREE different types of ammo while auto-loading pistols can only fire the one they were designed with.I agree with everyone's reply, but............. there are exceptions here and there. Who hasn't shot 38 specials in their .357 mag??? I guess the bottom line is if your not sure, ask the pro's at HPPF.
I do agree - and yes I have shot .38 in a .357Mag. It used to be much cheaper to shoot .38s than it was .357The mechanics of a .38/.357 Mag are quite different than the 9mm/.380 auto loaders.
7.62 mm Nagant is also known as 7.62x38mmR (Rimmed) or "Cartridge, Type R." The projectile is seated below the mouth of the cartridge, with the cartridge crimp sitting just above the bullet. When fired the crimp expands into the forcing cone, completing the gas seal and ostensibly increasing muzzle velocity by approximately 75 ft/s.
The 7.62 mm calibre was chosen, in part, to simplify the tooling used in barrel-making and manufacture of projectiles-the Russian service rifle of the time-the Mosin Nagant M91 featured an identical bore diameter, being chambered for the 7.62x54R rifle cartridge.
Handloading supplies (particularly proper brass) which were once relatively difficult to obtain, are now readily available for the 7.62 Nagant cartridge. Newly produced 7.62 Nagant ammunition is now available from Hotshot and Fiochi, and used cases from either company can be reloaded. New empty brass cases are available from Bertram. 100 grain wadcutter bullets of .311 inch diameter are also readily available. Dies, trimmers, and shell holders are available from Lee and RCBS, once again making 7.62 Nagant ammunition affordable.
Other cartridges-.32 S&W, .32 S&W Long, .32 H&R Magnum, and custom handloads using .32-20 Winchester, .30 Carbine or .223 Remington cases-will also chamber and fire in the revolver but will not achieve the gas seal.