OK, back to the topic at-hand.
It's no secret that I thought one of my favorite local instructors' demos was awesome, in demonstrating the role of stance (
https://www.thearmorylife.com/forum/threads/is-your-shooting-stance-wrong.146/#post-3819 ). The following with "Super" Dave Harrington is yet another:
I completely agree that one of the key fundamentals is stance. Furthermore - and this comes from my martial arts background, not just from shooting - I firmly believe that having a good stance will help any shooter shoot better.
When I fell apart at-distance (25+ yards) in one of my first beyond-the-basics classes, I asked the instructor, Chris Costa, if he could give me a critique as to why.
Guess what?
One of the things that he listed was that my stance was inconsistent.
So guess what I do, now, every time I need to make that low percentage shot?
I
consciously build it from the ground up.
That said, "stance" as it relates to the defensive shoot (or competition), as discussed in the article cited by Annihilator above, is a luxury.
I'll take it if I can get it. I'd love to be able to get in to my favorite "stand and deliver" stance.
But if I can't get that opportunity, I need to know what to do to otherwise maximize my chances of success. I need to understand the role that stance plays in the fundamentals of marksmanship so that I can properly compensate for what may well be my less than optimal stance at the moment that I need/want to shoot. What little I've done of integrated combatives and force-on-force has demonstrated to me that in the vast majority of cases, the defensive shoot is a dynamic one: there's lots of movement - both on my part as well as that of the opposition's. I have to consider that in the fight, I may not be able to stand and deliver in the "belt-buckle-to-belt-buckle" manner, as the late Louis Awerbuck notes.
And in those moments, be it I'm mid-step in a full-out-run or bladed completely to the side as I drop-step lunge or even if I'm in urban-prone on the ground...I have to understand what else I need to accomplish in order to make up for the fact that at that split second in time, my stance is compromised or even non-existent.