I'm of the same mind as 762 and ,if I may ,let me tell you about the Ruger American Hunter in 6.5CM that I bought a month ago:
18" heavy barrel, 1:8 twist, Magpul Hunter Stock, straight up factory rifle. The only change I've made to it is replacing the factory trigger return spring with one the reduces the trigger weight to @ 2lbs. I used the same load I've been shooting in my 6.5 CM gas gun this season in PRS (Lapua brass, CCI LRP, 140 ELDM, 40.6 H4350, 2.850 c.o.a.l moving at 2500 fps. Running a suppressor.
The chamber is very rough, but the barrel rifling is overall very smooth with only very minor tooling marks. 100 yard zero, at least .5" MOA over several small groups.
Trued it yesterday using Gravity Ballistics out to 1K. Dead nuts on the marks and compared to my ballistic app profile (Strelok Pro) only +/- .1 difference when it wasn't exactly the same reading. Supersonic out to 1250 yards.
Buy bullets and powder and shoot that thing.
Best wishes