I started with 22H PPU brass straight out of the bag. It looked pretty good so instead of FL sizing it I just proceeded to prime, drop powder and seat a few bullets. (I think I had Lapua brass on the brain). I couldn't get a bullet to seat without bulging. After a few head scratches I decided to FL size the brass and try again. That worked without an issue. So, my lesson learned was to FL size the 22H PPU brassbrass first with .
BTW, 13.0 grains of Li'l Gun with a 30 Barnes VG and a 450 primer measured .8 inches, 3 shot group. 3136 FPS Avg. Not a bad start.
PPU loads their 22Hornets with .2225" bullets, so yes, resize.
