Thanks for the advice on the 300 WFN in the 454 Casull. The groups have shrunk some, although not as much as I'd like, but they do seem rounder. I have gone up to 33 grains of H-110 in my Freedom Arms and the cases still come easily out of the chambers and the primers show no sign of flattening. I haven't been above published data much before. Can you measure the base of the case before and after firing on a hangun cartridge like a bolt rifle?