The 284 win and 284 Shehane has won more 600 and 1k F class matches than just about any other cartridge but if I was building a custom rifle I'd build a 7/6.5 PRCW but it really doesn't matter what you build or what caliber it's in you aren't going to outshoot any factory chambering or factory rifle at hunting distances anyway but like Townsend Whelen said "Only accurate rifles are interesting".