1:8 heavy varmint
Bartlein is a barrel maker owned and operated by shooters who have been involved in barrel making for many years. They built state-of-the-art cut rifling machines which Bartlein says can hold uniform twist rates to the 4th decimal point. Several nationally known benchrest shooters shoot Bartlein barrels. We have Bartlein barrls on many of our own benchrest rifles, and they shoot well.