I had two failures to fire today with my Glock 20 using Win brass and CCI primers, the strikes looked light, so I'll have to detail strip and clean my slide, also double check my priming procedures. This, and a recent thread over at THR got me thinking about primer sensitivity. I had always thought CCI were more sensitive, and Federal less sensitive, but now I'm wondering if I have it backwards. My buddy has a T/C carbine in .45acp, and my handloads with CCI primers have trouble in that gun. My Sigs and HK's have no trouble with CCI LPP, but both my G-20 and G-21 have. Are Federals more sensitive than CCI's? Winchester in the middle?