TomJ
Contributing Member
I've been reloading for a little while, and have exclusively been using jacketed bullets, whether RN, FN or HP. Other than a couple of loads that were a little light and did not cycle my guns, I've had no issues. I recently tried a couple of hard cast bullets and am running into issues with my guns not going into battery. It occurs with almost every round, and it's happened with 9mm and .45. They were hard cast bullets from RMR and the Missouri Bullet Company. The hard cast bullets are expanding the brass a little more than the jacketed bullets as their dimeters are slightly larger, but the difference when I measure them with a caliper is minimal. The outside diameter of the RMR 185 grain bullet is .45. Loaded, the OD of the brass is .47. The OD diameter of the 200 grain hard cast bullet is .452. When loaded, the OD of the brass is .472. It's occurring in my Glock 30s, Sig P220 and P227 and my XD 45, so it's not an issue with a gun. Could that slight difference in diameter cause this? If not, any ideas as to what the issue may be? I do have an ammo checker from Lyman, and the case diameters appear to be within spec.