I know what you mean about the muscle memory. I used to be a SIG guy before I bought a Glock and still wasn't fully converted. Then the dept started issuing Glock 22's. Their gun, they did the maintenance and supplied the ammo for qualification, training and practice. At this point, I have easily shot 10K-20K+ rounds downrange from various Glocks and muscle memory is something I could do in my sleep almost. Glock 17 5th gen, G30SF, 42, 43, 27--They all hold, point and shoot similar for me. I haven't picked up a G19 yet but maybe someday. I'm still more focused on hunting rifles.