Of my three Glocks only one of mine was like that for a while. After about a month it worked itself out and now all my my mags are easy to rack when full with the slide closed. Is your Glock new, low round count?On a Glock I find that if I loaded all 10 rounds it is quite hard to rack the slide to chamber the first round, so I usually lock the slide open first, load the mag, then rack the slide.
































