Thanks for the help. I got back out to the range this morning and did all the things you suggested: the .22, shoot at the berm just watching sight, etc. Then just got to work shooting slowly and accurately at 3 x 5 cards. First at 5, then 7, 10, 12, and 15 yards. Watching the front sight and making sure I use a smooth trigger pull, uninterrupted, made all the difference. One other thing I found was my groups REALLY tightened up when I loosened my strong hand grip, and didn't tighten my support hand grip, i.e., I was shooting with a lighter more relaxed grip. By the end of the session, I was shooting almost as fast as I could reacquire the front sight and keeping all shots on a 3 x 5 card out to 15 yards.
One day ago I was missing a 12" circle, today I'm hitting 3 x 5 cards. I just need to keep it that way now.