I have heard experiences from some of you fine folks on shooting the .45Super in your Glock 21 and 21SFs and I appreciate your input. I have decided to follow the advice of some and set my 21SF up for occasional shooting the .45Super with heavy (22lb.) recoil springs, SS guide rod and a Lone Wolf chamber supported barrel and .45Super brass. I'm curious, what are some of your other experiences with this round in the Glock 21 platform. In other words, the dos and don'ts to be mindful of that you have found out in shooting the .45Super in your 21s? I will be shooting this round on an occasional basis in my 21SF and am not dedicating the gun to full time .45Super shooting, just for practice and hunting. Thanks.