I acquired a 84m Kimber a couple of years back. The previous owner was using Winchester Deer Season XP 125 gr and I got 3 boxes with the rifle. They grouped well enough but I really wanted a heavier for caliber option and found Ferderal Premium loaded with 140 Accubonds. I have had very good performance out of the ABs so I bought a few boxes. The rifle likes the Federals a little better than the lighter loads. My issue is when I rack a new cartridge it takes a considerably more effort to lock the bolt with the Federals. My initial concern was OAL but I can find no indications that the cartridge is being forced into the chamber. I have taken a couple and worked tge bolt up and down several time repeatedly and the wear spots seem to be on the bottom of the rim. Has anyone else noticed an similar issue before?