I see OP responded. I’ll look at the book. My rifles have 1:10 and 1:9 in the 20” shortys. I use my short barrels to shoot pigs from point blank to 400 yards.Whats your twist rate?
If you guys want a long range 308 with the 168-175 class bullets you can get thru transonic transition with a faster than normal twist rate 1-8 or 1-9. i would use the 1-8 for short barrels and the 1-9 in long barrels. I say that because I have shot out to 1 mile with accuracy when you overspin that class of bullet. I shot this at a mile with 168 berger hybrids. If you look over the bottle cap in the first pic you can see some grain bins, that was the shooting location. If you go to 6mm benchrest/accurate shooter daily bulletin and search Jim See there is a full article on it.
You're going to have to drop to a 150 to 155 grain bullet to get better performance in that barrel.Twist is 1-12.
Ill check out that book as well, thanks.
Maybe ill try some lighter bullets and see how they shoot.
I used the 155 grain Palma bullet in a 1:10 twist with good results.Thanks for the input everyone. I will pick up some lighter bullets and go from there.
Its good to know the limitations of this round for this gun as we use it as a duty round for our precision rifles.
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