I have many many hours of combat training involving handguns, nighttime scenarios, combat rifle/shotgun techniques, etc. From my experiences, the hand-over method is still best. The point here is being missed. The objective is to release the slide and/or release the mag with your weak hand so you do NOT rearrange or disturb your grip on the weapon with your strong hand. Some people can reach their slide release on their weapon fine with their thumbs, some cannot. Firearms vary from manufacturer to manufacturer and not all are the same size, design, etc... Once the hand-over method is perfected, it will not matter what firearm you are using, you will always be able to reload in a swift and effective manner.
In the event your weak hand is wounded and cannot fuction to release the slide, we use the "boot" method in which you kneel down and hook the rear sight on the heel of your boot, and push the receiver down in a swift motion. The same method is used when inserting a mag with only 1 hand available. The mag is held between the feet while kneeling down, and the magwell is placed over the mag as far as it can go. Tap the bottom the mag on the bottom of your boot then quickly hook rear sight on heel and release. After repetitive training, I can drop a mag, place new one into position, and release the slide in a little under 6 seconds keeping my left hand in my pocket. It is a very good thing to keep yourself proficient in, especially if you are in law enforcement. I teach these methods to civilians as well just in case they are ever in that situation themselves.
In the event your weak hand is wounded and cannot fuction to release the slide, we use the "boot" method in which you kneel down and hook the rear sight on the heel of your boot, and push the receiver down in a swift motion. The same method is used when inserting a mag with only 1 hand available. The mag is held between the feet while kneeling down, and the magwell is placed over the mag as far as it can go. Tap the bottom the mag on the bottom of your boot then quickly hook rear sight on heel and release. After repetitive training, I can drop a mag, place new one into position, and release the slide in a little under 6 seconds keeping my left hand in my pocket. It is a very good thing to keep yourself proficient in, especially if you are in law enforcement. I teach these methods to civilians as well just in case they are ever in that situation themselves.