357 sig not going into battery with reloads in General Reloading Posted January 29 · Edited January 29 by SuperDuke What brand resizing die are you using? When I started reloading 357SIG (resized 40S&W) I used an RCBS which did not set the shoulder low enough and would cause slide not to go into battery. Ended up machining some of the base of the die off (can’t remember how much) to get the shoulder of the case right. I’ve since switched to Dillon resizing die and haven’t had any issues. Alternatively your resizing die might have backed out just enough or it’s not touching the shell plate. I had issues with old Winchester cases given to me by a fellow shooter that had been used in a Glock. Had a lot of bulged cases and had to throw them out. After that I got a rollsizer and put everything through that before resizing. Last thing I never bothered with a case gauge, always used the barrel to check rounds (don’t bother since rollsizing and have about 10k through mine and a couple of friends guns without issue).