rifling rate of twist

Err, sounds like some bad data.

Rate of twist determins what weight bullets that will be stabilized with a give cartridge. There is actually a formula out there to calculate what ROT is needed for a given caliber and bullet weight (but I forget the formula). The heavier the bullet, the more RPM you need to stabilize it, so a faster rate of twist is needed. (faster meaning, one twist in LESS distance). For .308, if you are shooting 175+ then I generally recommend 1:10" (or 1:11" if its an option).

Your 1:10" works great for just about all common weights shot with the -06

MEL

THanks JLU, that looks like the one I remember.

In terms of lighter bullets with faster rate of twist barrels. Yes, there can be cases of "overstabilization" with light bullets, but the cases are generally extreme. You "should" be fine with a 145 in a 1:10 twist, but notice I said "should" as I have not fired any bullets that light through my .308 rifles.

MEL

For 168 1:10 and 1:12 will both work. if you ever plan to shoot 175's, it might be best to go with a 1:10" barrel

MEL