I didn't get much action on my 22-243 thread so we'll try it this way. Has anyone been developing loads with bullet in the hotter 22 calibers? I loaded some in 22-243 mid and got a couple of keyholes. I'm still waiting on my kinetic bullet puller because I don't want to waste 15 of these high dollars babies! Barrel has less than 200 rounds through it slow fired and no really hot loads. It is a 28" mgm encore with I believe a 1 n 7 twist. I haven't checked my crown yet but the barrel looks good inside. Load was 44 gr. of 4350 SC. It could have been 4831 SC but either way should have stabilized. MGM uses Shilen match barrels and I've yet to get much copper out of it however I will be checking that and the crown next. Just curious if people have been working with this bullet and what their thoughts on it were. Thanks