I've got a well-battered Gen2 Glock 17 that's giving me some trouble. Two problems. One, it has a nasty habit of pelting my forehead with shell casings. Apparently this is fairly humorous to watch, and the small half-circle marks on my forehead after shooting are sort of funny, but altogether uncool. The second and more serious problem is that it occasionally stovepipes, with the primer end of the casing facing downward. On one occasion the gun also double fed upon clearing the stovepipe. I'm thinking that, aside from the above problems, the gun probably needs all new springs anyway. So, that's step one. But could my ban-era magazine (dated 9.13.94) be part of the issue, as well? Also, is a weak recoil spring causing my odd ejection angle problem, or do I have a broken extractor?