I have read the books and watched the videos regarding the new (to me) standard in grips of pointing both thumbs forward without applying pressure to the slide. I have done the Burkett timing drills and adjusted my grip to optimize my groups as instructed. The problem is, I find that I can still get tighter groups using the old grip (which I have been using all my life) of low thumbs with the support hand thumb over the top of the strong hand thumb and squeezing the gun a little harder.
I have tried shooting the high thumbs exclusively for about a month (just over 1000 rnds), but at the range today I finished off the session using my old grip and got much tighter groups. What do I do? Stick with it and it will come to me eventually - or go back to my old grip. I don't want to be limited by an inferior grip but on the other hand I am lacking the confidence in high thumbs if a precision or long distance shot is needed.