I'll stop hijacking gooldy's idaho thread and just start my own. I had heard a few people say that shooting with a dot can accelerate your shot-calling development and general learning, and last year I was just about to buy one to put on my 22 steel gun when I conveniently won a c-more slide-ride at the 2016 idaho state match. So I shot some weeknight steel challenge in the spring, and practiced a couple times, and even on a 22, it seemed to be increasing my awareness of where exactly the gun was pointed *as it fired* (not as I started pulling the trigger. Perhaps not coincidentally, about the same I began to actually see when my SS gun was dipping down below the original shot when I fired the 2nd shot, and I stopped being surprised by the occasional mike or no-shoot on horizontal partials. That prompted me to experiment a bit with a lighter bullet (200 vs 230) and a lighter recoil spring (13 vs 14) to really start seeing what allowed me to fire a 2nd accurate shot most quickly and confidently. It also started becoming obvious that my grip was an important part of that process. A month or so later, using 200 gr boolits, I nailed down the last 2 classifiers to make M in singlestack. Hooray.
So then I got to thinking if standing still shooting a 22 with a dot helped my visual awareness significantly, it might help even more to get a CO gun and start doing some real movement-oriented dryfire and livefire. So I found a decent deal on a p09 package, complete with dot and extended mags. I've put 500-600 rounds through it now in practice, and I've been using it for most of the afternoon portion of my dryfire, which is diverse movement stuff (as opposed to the morning 20 mins which is most of anderson's first 12 stand and shoot drills). I'm also using the CO gun for the first half of my live-fire session, particularly the shooting while moving and dynamic entry/exit stuff.
It's hard to quantify after only a couple weeks, but I think I am definitely seeing more than I ever did before, and even just dryfiring the heavy-ass DA trigger while watching the dot has made more conscious and disciplined about my grip. I've moved my end-of-session accuracy drills back to 20 yards from 15, and still putting just about every shot into the upper A-zone. I don't know if I'll ever shoot this gun in a match.... I don't actually like the gun all that much, but at least it's not a glock. Still, just using it in practice seems to be accelerating my learning curve, and what I'm learning seems to translate directly back to iron sights.