I'm looking to cast 224 for my AR. It is a 16" carbine gas 1:9" upper. I'm not looking for bullseye accuracy, just looking to ring some steel out to 300 yards and punch some holes in paper. I will be PC the boolits with no GC. Just looking for some recommendations for a mould that feeds reliably in an AR. Also, the more cavities in the mould, the better.