Loaded about 500 (I know load a few and test before doing a bunch) 300 bo with a rcbs 130 pointed gas check bullet. Havent been able to do any real accuracy testing but they seem to shoot about 3 inch off hand at 50 yards so there acceptable. Well almost. The snow finally melted and I found a whole bunch of gas checks half way to the target and found about 20 of the bullets. Every bit (or at least lots) of pc is missing on the bullet where it engaged the rifling. Now heres my theory on it. I had to flare the cases to get the bullets to seat without shaving so I used a lee factory crimp die and put a pretty good crimp on them. Im wondering it that crimp pealed the pc off the bullets and maybe the gas checks too. the bullets pass a smash test just fine. as a matter of fact they were out of two different colors and both passed the smash test. Never seen this before but then I haven't used pc at 2000 fps either. By the way the bullets were hard. cast out of 5050 monotype and ww. tested at about 22 on my hardness tester. So basically linotype. Bullets showed no sign of stripping through the rifling. All showed nice rifling marks on them. Loaded some more with no crimp, just straightening out the rim but theres not enough snow left to test them! By the way I did shoot about 200 of them out of that gun. Bore looked like it had just a tinge of leading but it wiped right out with a brass brush. really no harder to clean then if I would have used jacketed and I cant figure that part out either. Im sitting here with 500 more of them that is my own stupid fault. Youd think after near 50 years of this kind of mistakes id learn. but winter is long and boring and reloading passes the time.