At this point the powders I've used which seem to have been effective are Varget, of course, IMR 4064 and 3031, as well as Winchester 748. They all seem to be fairly accurate with 748 seeming to have more recoil. Barrels are 308 1 in 12 and 1 in 10, and 223 1 in 9. Projectiles are various 168's...