357 Mag is I hate revolvers and I'd rather have 8+1rds of 10mm with another 8rd magazine ready than 6rds of 357 Mag with another 6 in a speedloader. People will often choose a lower level of power for self-defense. Most 10mm chambers can take a 1.275' cartridge, since the OAL was based off the. 357s can use long nosed boolits seated out into the cylinder where the 10mm has to fit in the magazine - so heavier boolits intrude on powder capacity. The limitation to the 10mm is the overall length. 357 Magnum in service length barrels with all the benefits of an autoloader. Practical ballistic twin (without splitting hairs) to the. That's why I chose the 10mm as my general purpose weapon. If they want to duplicate the 125gr JHP loads of the 357 Magnum in a bottom feeder, go. 357 Magnum heavy bullets in a bottom feeder, go 10mm. 357's I've seen holds 15+1 and only 2 I know of take a detachable magazine.

The 401 Powermag has a more interesting history than the 10mm.īut the 10mm fan boys need to keep it real. The 10mm Automatic was a SAAMI cartridge in 1983. Never heard the term 'cannonized' so I'm not sure what it means. The 10mm came into existence 41 years ago (1972) from Irving Stone and Whit Collins, and was 'cannonized' by Jeff Cooper. Four inch barrel in a revolver isn't the same four inch barrel in a 1911, as the 1911 barrel length measurement includes the ~1.275' chamber length of the 10mm a revolver's cylinder (chamber) isn't included in the barrel length.Īn newer cartridge are 'Johnny come lately' newbies. 357 has a full length barrel whereas the 10mm has part of the barrel length also containing the chamber. It's closer to being a ballistic twin of the. (180 grain bullets from a 5' barrel of a 1911 at 1300 fps, yielding 675 fpe a 200 grain bullet from the same barrel yields 1225 and 666 fpe.) In full-power dress, it bridges the power gap between the. The 10mm was designed in 1983, not the 'mid 1970's'. The 10mm has been continually produced since the mid 1970's.

Glock 10mm rounds