I have two Glocks, a 19 and a 20. The 19 is great. The 20 has been giving me trouble, and I can't seem to figure it out. It is absolutely reliable with factory ammo. I get a fair amount of light hits, almost 10%, with even very good quallity reloads. (My own). I get a centered light hit. A second strike fires the round. There is a brand new factory firing pin and a brand new factory firing pin spring. The channel isn't gunky, and I cleaned it out anyway. The firing pin safety seems to be working normally and the trigger bar is not deformed. Extractor tension seems normal. Any suggestions will be greatly appreciated.