I've got some RL-15, AR Comp, Varget, H380, H 414, a pretty fair variety, mostly the good stuff for loading over bore. Various RL's, 22,25,19. I just loaded these up to get acquainted with the rifle and cartridge. Stuck an old Scopecheif VI 3x9 on top of it. If it's not freezing, tornadoing, or flooding I'll see if it explodes this weekend. My bench is right next to my barn so its pretty easy to make adjustments in a load. The Grendel is what got me started down this road. I never thought I'd see 1/2" groups from a franken AR 15. I hope this does at least as well.