Over time I've seen mentioned "10+1" capacity. I'm relatively bright so I can puzzle out that this means "10 in the magazine, 1 in the chamber". When I bought my G30 a few years ago I thought it was "10+1", but I could never figure out how to make it work. If I fill the mag with 10, insert, rack the slide to chamber the first one, then eject the mag to top it off with one more, I can never get the mag fully reinserted - there's just no spring left in the mag to allow the 10 to be pushed down far enough so that the mag will fit into the mag well.
Am I just being too gentle, and if I really give it a good shove it'll work, or am I mistaken and the G30 can't do 10+1 (and have therefore been wise in not trying to force it)? Can any Glock owners (or others - don't feel like you actually have to type the name

Thanks,
JT