Hello to all, I;v been reading lot's threads on this subject on GT, And have a question . I shoot 3 calibers . 9mm. 40 S&W, 357 sig. I read about "SET BACK" on ammo right out of the box ! How can I find out the tolerance on this issue ? I can measure to .005 OAL. My concern is that major set back can cause major pressure problems ! I don't re load so any help would be helpfull, thanks, G-26 G-27 G-19 G-33 Wanna kill these ads? We can help!