I'm a believer in a strong grip, your constant companion in the car and living room should be a spring type grip exerciser or a tennis ball.
DirtySteve said:
Just checked and all mine have flat main spring housings. One has groves and the remainder are checkered. I prefer the checkered but the grooved functions fine. I have one with a Smith & Alexander mag well.. If these guns look a little used rest assured they have been. I have no use for a safe queen. The Kimber and the long slide have, well the term thousands of rounds get thrown a round a lot, and that would be an understatement for those two pistols.. lol..
Re '27 change. Shooting low? Probably an increase in grip with jerk when anticipating the shot. Doing a ball and dummies w my students, they most always go low. Heeling is less common in my experience, for the newer shooter.