Friends, I have a full-size P320Rx that I have taken to the range several times. The last 3 times I've been experiencing intermittent failure to go into battery. I'm using steel-cased Winchester 115g 9mm brown box ammo which I bought at Bass Pro Shops. I personally don't think the ammo quality should have anything to do with it. In fact, I've had it happen a few more times using Sig ammo as well. I've disassembled/cleaned/lubed/reassembled several times but I'm still having problems. I've also noticed the recoil spring is incredibly squeaky, so maybe that's it. I'm considering swapping out the recoil spring for a lighter one, but that might end up making the problem worse. Any help would be appreciated.