mtlcafan79
Ultimate Member
I'm using N320 for mine. I'm only using 5.x-6.xgr depending on the load. Accurate 1680 used to be the cat's meow to get stuff to cycle. It works because it's gassy, but it's also and loud and dirty by comparison. H110/296 will cycle well in most suppressed setups. Problems start to show up in non-suppressed setups with failure to hold the bolt open especially with carbine gas.