Gee.....
Relatively static shooting conditions at most ranges is one thing...real life, however, often is not so clear cut.
Ho hum, at my age you use whatever stance you can manage with the least hurt and do the same with your hands.
No, I'm right-eye dominant, and I'm 79, and I'm not moving about, and the target is fixed in place 15, 25, or 50 yards away. When possible, I use a red dot sight, with second choice being adjustable open sights (suitable for bullseye shooting). I wasn't clear enough when I posted this thread, sorry. The targets are scored after shooting 10 rounds, and I would like to get better scores. I guess there is no simple answer to my question, so I'll simply continue with what I've learned, face the target, lean forwards, grip the gun with my right hand, and use my left hand to fill in the empty spaces on the gun, pretty much as Chris showed in his video. This has the gun directly in front of me, lined up towards the target, and not in line with either of my arms - it's between them. I try to support more of the weight of the gun with my left (support) hand, which gives me better trigger control - and speaking of trigger, I just gradually apply more and more pressure, never being sure of exactly when the gun will fire. That alone made a huge improvement in my group size. Guns can be anything from a tiny PPK/S to my old S&W Model 29's, bu I'm mostly talking about guns like 1911'a and my new (very frustrating) Springfield SA-35 which seems to have a mind of its own, and has already been returned to Springfield four time, where they eventually replaced the whole gun, and on the next return, did a trigger job and replaced the barrel. It now has a 5# trigger that feels reasonably smooth, but has a little "creap". My other guns behave better, or maybe I should say I know how to shoot them better. I'd like to shoot one handed, but I'm not strong enough. If it wasn't for the SA-35, I wouldn't be posting this thread. That gun seems to have a mind of its own - or maybe it's really as terrible as the guys at BH Spring Solutions told me. If I wasn't so stupidly stubborn, I'd get rid of it and go back to my other guns that work.
When I try to align the gun right down my right arm, I suppose my arm does better at fighting/absorbing the recoil, but my head is cocked so far to the right to look down my arm, it feels very un-natural.
Thanks for all the advice, but much of it doesn't apply to someone just standing in place, shooting at paper targets, with no concern of them shooting back at me.
......added later - most of my guns eventually give me reasonable results, but I've had horrible luck with 9mm. My Taurus PT92-AFS refused to shoot well for me, or my friends. My Springfield SA-35 is finally almost acceptable at 15 yards. My definition of minimally acceptable is "all holes in the black in a B-8 target at 15 yards. I'm using 115 grain ammo, but will be switching to 147 grain, which other shooters tell me will work better for me. But watching Hickok45's fifteen minute review of the SA-35 suggested the gun is more capable than what I'm thinking it is.... meaning the weakest point is ME, not the gun, which I fully accept. Next step is to shoot it from a rest, and decide if I want to keep wasting more time or ammo on it, or dump it.