When inserting a fresh mag with the slide locked open, When I try and either close the slide by hand or with using the slide stop it sometimes pops the first round out of the mag so it ends up sitting straight up and down in the now closed (partially) slide. I guess like a stovepipe only with the first unfired round.
Additional info: it's the full size version made by walther. running mini mags. I live in canada with 10 round limit so our mags are usually pinned (not sure mag cap in the states), and the problem happens with racking the slide or using slide stop to close slide.
Aside from sometimes not wanting to chamber the first round from a fresh mag it runs pretty flawlessly.
What is the reason for this? I did a google search and couldn't really find anyone else with the problem.