So I am having an issue with my pistol and I just want to know what the best way to narrow down the culprit is. I bought a Salient glock 19 (yeah I know expensive Tupperware) and subsequently bought 1000/rounds of ammunition from a source I had not previously purchased from. About one in fifty would not go off with one strike. I removed them and then chambered them again after eliminating the possibility of a cook off and they would fire. I guess the meat of the question is how do I determine the cause of this. I have ran a bit of the same ammo through another glock with no failures so far. I have also ran different ammo through the offending salient with no issues so far. What would you recommend I do? Thanks for any and all help!