My particular Shield won't feed my lead reloads. All my other 9mms feed them without issue. This includes a couple of 1911's with "match chambers". I suspect this particular gun has a tight chamber, but haven't investigated further. It feeds factory ball ammo ok. Don't know about ball reloads, I've never made any. BTW, when I say it won't feed, what is actually does is not go fully into battery. Misses by about 1/8". Kinda spooks me, since I'm convinced that a Shield will fire slightly out of battery. Not 1/8" out, but enough out to rupture the case.