Yesterday we were shooting a buddies recently acquired Glock 19. The gun kept jamming (FTF) onthe last round and having light primer strikes. We are guessing the jammingissue was due to a couple of the mags that have been loaded to full capacity for8 years and not been touched. We know that these magazines have been loaded forat least 8 years because he bought it from his sister who hasn’t touched sinceher last marriage. (8 years ago) But the real question is why the light primer strikes?I though Glock’s were supposed to be the end all be all of reliability. We wereusing Winchester white box which with all of my guns as worked just find. Ihonestly know nothing about Glock’s so can you Glock owners help me out?