Hoping I can get some help. I just picked up a brand new glock 20 SF. I bought the only 10 mm ammunition available pm bronze 200gr fmj/tc, I shot my new baby and experienced something I never have before...my new glock choked! In the box of 50 pmc I had 5 failure to eject. The spent cartridge was partially ejected and the slide was trying to feed the next cartridge from the magazine. I also had the slide lock back a few times when ammo was still in magazine. After the first instance of slide lock back on a full magazine I took care to make sure l was not bumping slide lock with my fingers,it still happened multible times. Have any of you experienced issues such as these? If so,might you share your solution? Thank you for helping!