got a new glock 27 the other day. Mags take 9 rounds it says. I know about seating them by banging the bottom and after some work i got 9 in after leaving 8 in for a few days for spring to settle down. Mag doesnt fit into the mag well very good with 9 in it. gotta bang it in and i think i heard to always slide it in. 8 round mags slide like butter. 9 doesnt feel right. I always keep my other mags light. 20 rounds in the 30 round mag for the AR15 and the mini14. Never jams up light, feed problems when full. Does the glock run the same? Still havent shot it yet so i dont know about feed problems with the glock. You guys run into this with new glocks.