So I was loading up a few of my 9mm magazines for my G17 after emptying them for my trip to Glock today and I ended up putting 18 rounds in the mag. I've been able to do this before when I had a G19 but I simply didn't because it was really hard to do. However it wasn't difficult for me to do so with my G17 magazines at all. Has anyone done this and have you ever tried firing from a magazine loaded with 18 rounds to see if it feeds properly? Thanks.