IIRC, the PPC-sized flash holes are supposed to be ~0.058-0.059" in dia.... the extra-small PPC-sized decapping pins for Redding dies are something like 0.057", which ain't much difference to work with. I kept losing my decapping pin in a case and not realizing it for several cases, then having to go back thru and root thru the bin for the ones that got missed (and to find the one with the pin stuck in it).
Easy solution is from Russ Haydon's Shooter's Suppy - they sell a PPC flash hole reamer that will open them to 0.062", and no more stuck decapping pins.
I had fits with my loads last year (B155.5BT over Varget in a Lapua Palma case, CCI 450 primers)... went from shooting *great* at home in WA state in ~90F weather in August, to Raton NM where I couldn't hold the freakin' 10-ring for vertical @ 300yds first string in the morning. 500 was similarly hideous, and 600 sucked a little less. In the afternoons @ 900/1000 my scores would perk up considerably, despite the longer distance and more wind. Finally figured out that the ammo being in the unheated pickup over night (staying in the campground, where it routinely was down into the 40s, and occasionally high 30s) might be contributing. By the afternoon, when the ammo had been sitting in the truck soaking in the heat as the days warmed up to ~70F, things started shooting closer to 'normal'. I started running the defroster in the truck for an hour each morning, and then keeping the next strings ammo in my pants pockets to keep 'em warm... helped somewhat. I had some other issues going on with a scope, but thats my take on the small primer .308 brass in 'cool' weather. Varget + CCI450s + 40F weather = terrible vertical for me.
YMMV,
Monte