I would doubt it, but I've been wrong before The Precision Hunter ammo uses long, heavy high BC bullets. Unless you are shooting a custom rifle very few, if any factory 243's have the correct barrel twist to shoot those bullets well. And the guys who build custom rifles usually hand load their own.
That is what the 6mm Creedmoor was developed for. It offers an out of the box rifle and ammo suited for those bullets instead of having to go the custom rifle and handload route.