It's pretty easy with a tight radius pistol grip (or extreme radius like Fred Etchens espoused) to have your wrist nice and relaxed and dominant and able to impart a bit too much control to the aft end. Means sliding the butt strait up and then the muzzles tend to seesaw below the target track. Even with a semi-pistol, let alone strait grip, my wrist is sort of "bound up" or locked. Vertical slide up the body isn't as easy but even if it is, at least it makes the elbow lead to ensure a nice high shoulder pocket. Add a little more LOP and the butt will hang up if you slide, so you do the bayonet thrust first and then back in the pocket and supposedly muzzles don't dip. Hasn't made me a great shooter but that's the theory I subscribe to and the one I try to practise. The Brit gunfitters love that coins on the rib (barrels) trick. I use Susan B. Anthonys.

jack