I used my conversion barrel for the first time and now I realize why 357 sig cost more than forty. It is much more accurate, the follow-up shots are faster, and the bullets feed easier into the chamber. I don't know if I even want to shoot 40 anymore but I probably will because it's cheaper. With 357 sig you can see true precision. The target at 25 yards seemed closer after the conversion. The recoil seemed much more manageable. I think I'll try my underwood 40 ammo and compare them next time.