Ok, so I just got back from a 3 hr practice session at the range, shooting my K38 with 148gr Zero HBWC, 2.8 grains of Bullseye. When I emptied my spent brass (about 130 rounds) onto the bench I noticed quite a bit of Bullseye "flakes". How much is too much, they all went bang and held respectable groups, but can't help wondering about the unburned powder, I never noticed this with my .45 brass. Any thoughts??