2bfree
Member
I read this all the time on the net
I load 124 FMJ 9mm all the time at .377/.378. My bullets are .3555 and my brass is .0115 X2 = .378. I have shot many many 1000"s of rounds with out a problem. They all plunk in my 3 9mm, pass a cartridge gauge. I even let a .379 slip by once in a while.
Am I missing something ? I think SAMMI specs are .380.
.Correct taper crimp should measure about .376" at the case mouth using .355" jacketed bullets.
I load 124 FMJ 9mm all the time at .377/.378. My bullets are .3555 and my brass is .0115 X2 = .378. I have shot many many 1000"s of rounds with out a problem. They all plunk in my 3 9mm, pass a cartridge gauge. I even let a .379 slip by once in a while.
Am I missing something ? I think SAMMI specs are .380.