I've been expermenting with reloading this round, I have found that I must wash the bullets and cases so the bullet is not pushed back when the slide goes forward. I usually only get .02 pushback, I find that about the same for factory ammo.
Get you a factory crimp die from lee 40S&W, then get a 9mm insert and crimp that sucker so hard, but be careful not too much to crush the case. That cured all my problems with the round. I kinda gave up on it because you have two extra steps with it, one, you got to lube the cases cause no carbide dies for it, two, this extra step.
357 Sig reloading information
