10-02-2011, 12:33 AM
I think you would need a fast twist rate of at least 1 in 8 to stabilize them. Without knowing the components you are using it would be dangerous to recommend a load. I have had success with both the 139 lapua and 140 amax using either re-15 or imr8208 in Hornady brass and 7-1/2 rem primers.
