So I decided to dump my 1911 (DW CCO) and get a Glock chambered in .45acp. 13+1 FTW! The G21SF just felt right. It was hard to find one locally. Lots of 4th gen 21s though. My second trip to the range I will say I had two jams while shooting some Winchester fmj. Today I went back and shot some Federal (fmj and hst) with no issues. I've added a Wolff 4lb striker spring, glock "-" connector and adjustable rear sight. I have a G19 with similar mods and a stock G35 and I will say that the G21 punishes a poor trigger squeeze much more readily than the other two. The dreaded low left syndrome will happen fast if you don't manipulate the trigger properly. So far I've only got about 275 rounds through her. Don't know that it'll see ccw duty right away as I feel much more confident with the 19 right now. But with more practice who knows. One of my targets at 10yds. Darn flier on the head shot group Took some shots at the scoring legend too. This holster is tight. Needs some break in. Who else has some G21SF love to share?