mcnamara0851, I am also working on an 8 twist, 22-250AI. I was hoping some folks here would respond with some info here!!! At this point, I have 100 pieces of Lapua brass fire formed. I have tried H-4831sc, H-4350, & now, I'm experimenting with RL-22. All loads after forming have been with the 75 A-Max. Problem is, I'm still searching for an accurate load. Hopefully someone with knowledge, & some experience will share their ideas! Idaho-45
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