My thoughts on the PC Shield are well known. Bad idea for a carry gun. I say that as a PC owner myself.
Those Hi Viz sights aren't the greatest. Would switch those out right away on carry gun.
However....to answer the OP's question....my buddy's PC Shield does seem to be pretty finicky with ammo. It's worked in a bit now, but when he bought it, it was a 50/50 toss up if a box of ammo would cycle reliably