Hi 98 220
I have a Rock Island 1911 in 10MM it's a great gun but if you are going to shoot the hot stuff make sure you replace the recoil spring with a stiffer one than it came with or it will batter the frame. As far as how it handles the hot loads the answer is very well once you replace the recoil spring. Shot a couple of boxes of Buffalo bore thru it with no problem.