With the current shortage/price situation on components I decided to try casting for my AR for Highpower practice/matches. Ordered a 225646, gas checks and .225 Lyman size die from Grafs this morning (they were the only ones that had all 3 in stock). Looking for a load that will shoot about 1.5 MOA at 100 and 200 yds. and cycle the action. Such a load should be good enough to stay in the 10 ring on a SR target. Don't need a lot of velocity, anything 1700 - 2100 fps should work just fine for practice, standing and rapid fire prone stages. More speed is fine if accuracy and leading aren't a problem.
I have some 2400, H4198, H4895. I have 8 lbs. each of RL15 and Ramshot x-terminator (what I use for jacketed loads). I think a slightly reduced load of RL15 might work well to keep velocity around 2100, keep pressure down to help reduce leading, but have enough port pressure to cycle the action? I know that the 1 in 8 twist is going to limit what I can do with cast, but thats what I got. Any tips you guys can give would be helpfull.