
Originally Posted by
Michigander
The biggest reason not to practice this way for self defense shooting is retention. That'll leave you with 2 or 3 fingers, depending on the gun, loosely gripping your frame while you cock the hammer.
Or if you're going for a 2 handed grip at the time of cocking the hammer, that'll leave you with your thumb in the way of the slide, either causing you to shoot hastily and injure your thumb, or wait till you have a proper grip to fire. Meanwhile you could have already had a shot off.
And what if you're still pointing at your leg as you're drawing, being in the process of cocking the hammer but not having totally cleared your holster, and then you end up fighting to retain your gun from a grab? Will your trigger finger not get involved and potentially grab the trigger and pull a Tex Grebner? I do believe it could happen, and that's why I don't practice this way with my Sig, nor do I suggest you do.
1911's and other guns with thumb safeties are set up so that you can grip the gun convulsively, as you would in a fight, as you deactivate the safety. There is a reason that they're by where your thumb naturally grips, and not on the back of the slide.