My Shield 45 has been failing to feed the second shot from my secondary magazine with the mag extension (7 round). The 6 round mag only did it once(after 100s of rounds).
The problem is the round is nosed down into the mag and a quick pinch back of the slide makes it go every time. just ran 50 rounds(cheap reloads one round had a light strike on a not fully seated primer but I don't blame the gun) through it and 1st mag did the jam on second shot then did 2 more mags no issue. Switched hands with maybe looser grip and it did it 2 shots in a row. I think possible causes limp wrist,mag,recoil spring,cheap ammo? Anyone else had this issue?