Thread: 300blk Loading Tips

Originally Posted by Beetroot

Are you saying the H110 will be better for supers?

I am saying that the seating forces that you get as a result of compressed loads can visibly damage projectiles.

When you come to loading supers, H110 and AR2205 both give good speeds but AR2205 is bulkier which leads to heavy compression up around max - somewhere you'll need to be IMO, given blackout's pretty pedestrian speeds.

Modifying your seating stem to match the bullet profile helps... a bit. My experience is with the 110 VMax, not the 125 TMK.

AR2205 fine for subs albeit a bit louder and dirtier at such low pressures vs faster powders like AP70N.