Some rifles don't seem to like some bullets. I'm big fan of Partitions, almost all my rifles have a Partition load I've developed for them, but have a 243 that I cannot find a load that will shoot 100 gr NPt's--H4350, H4831, RL-26, IMR-7797, WW or Hornady brass, WW or Fed primers, no combination has produced anything less than 2" groups. But it shoots 95 gr NBT's great. Go figure..........
