I'd be interested to see the results of your tests on the Glock 23. My neighbor has one. I got to shoot it when we went hunting last year.I don't know if it was a fluke or not, I just put a few rounds through it, but I was hitting better with it than I was with my XD. I don't really want to like Glocks but it kinda made me think I might have to get one one day.