First loads I shot were 150 Nosler BT, I didn't want to mix copper jackets and the last one I shot was 140gr SGK which in my previous test week earlier it grouped 0.263" @ 100 from the clean barrel. I only add half grain to the load from 52.5 to 53.0 of RL-17. After I fire one group I usually set rifle vertically to get draft through the bore and it stays that way until I feel its normal temperature, meanwhile I was shooting my LRPV.