I was just out today shooting my 6.5 hmr. First group of three @ 815 yd was under 2.5". I have shot lots of one hole 5 shot groups at 100 yds. The gun is heavy enough I can spot my own hits without a break. My vote is for the 6.5 HMR. It's my favorite gun to shoot.
Why not compare tikka ctr with 24" stainless barrel. Comes in 6.5cm
Both would be good guns.
Here's a comparison I wrote up on the Bergara and Sako A7. (Sako owns tikka)The reason I went with the sako over the tikka (I hadn't heard of Bergara at that time) was the better stock over the tikka and the 26" barrel
Im running the HMR 6.5 with a brake, and hand loads that give me .213 at 100m. Heavy enough. Good ergonomics and the brake cuts the recoil to watch impact. Love it.