Put 100 rounds through my Gen 3 G21SF. Been having a problem with shooting it slightly right of target, so tried out a new hold on it this time out. Seems like it's working better for me. Also tried one hand shooting with it (first time I've ever shot a handgun one handed), using both strong side as well as weak side. Pleasantly suprised with the results. If you've never shot your handgun one handed before, would recommend at least trying it. Doing so has given me a much greater appreciation of how much help a second hand grip really is. Plus, one handed gave me a much clearer understanding about exactly which direction recoil moves the weapon. Pics follow.