I use their ammo, too. I haven's shot their lighter weights in my Stag, but have loaded some 90's of my own with several different powders with no problems. I can tell you that in 3 different Stag 7's, the SSA 110 accubonds and 110 prohunters are both well under an inch and in one case shot an inch at 200 yards. These were the combat loads and chrono at 2750. I don't envy them having to produce top performance in semi-auto weapons with barrels which range from short to long with gas ports in various configurations and piston guns, too.