Comparing the Tikka I had in 6.5 CM to my CA 6.5 PRC there is more than 300 FPS difference in factory Hornady ammo. I could barely break 2600 with 147’s in the Tikka and the factory 147’s in the PRC are about 2940. Even with my hottest loads in the CM I was 200 FPS slower than the PRC is with factory ammo.