So i took my brand new Glock 19 to the range today! brought 50 rnds of WWB, 200 rnds of Federal Champion. It ate them all flawlessly and the gun performed well, I ran 15 rnds of Hornady Tap also. I ran out of ammo and wanted to shoot somemore, so i went to the rangemaster and bought 50 rnds of CCI blazer- the aluminum ones. It ran all of them flawlessly except for one round which caused the gun to jam and fail to go into battery, the round was the last one in the stock 15 round magazine, the slide wouldn't budge so i had to slam the back of it into battery and eject the round. i inspected it and it looked sort of normal but the nose seemed slightly set back, at this point i had 5 rounds of CCI Blazer left so i took the faulty round put it in the mag and loaded the remaining rounds so that the faulty round would be the last one in the magazine. Started firing and again it jammed on the last faulty round. I repeated the same steps above and ejected the round. After that i ran 7 rounds of Corbon DPX that had been rechambered a bit to get rid of it, it ran fine after the malfunction. So since this is my first malfunction ever with any glock that ive ever owned, and my first time shooting CCI would you say this is the gun or the ammo? I took a pic of the round that caused the failure: So what do yall experts think?