paratrooper covered it well.
I'd add that a "cocking block" can be made for most autopistols to assist in locking the slide to the rear in preparation for loading. Imagine a wood or synthetic block, clamped to your shooting position bench, machined so you when push the front of the pistol into a hole, it uses arm strength vs. hand strength to move the slide to the rear. Once the slide is back, you just lock the slide in the rearward position using the slide lock. Remove the pistol, insert a loaded magazine, release the slide using the slide lock, and you're ready to shoot. If carefully designed to keep the gun pointing in a safe direction, it could also be used to eject an unfired or misfired round of ammunition.
"Placement is power" -- seen in an article by Stephen A. Camp
(RIP, Mr. Camp; you will be remembered, and missed)