Well I have to disagree about varget. I shoot a lot of F-Class as well as Benchrest, today while there are folks useing Varget it is problematic in that Varget varies widely from lot to lot. It has gotten so bad that some complettly have to redo there load work up when just changing lots of Varget. I believe that in my experiance that a lot of Benchrest shooters are now using RL15, it is my go-To powder in both the Dasher and the 6BR.
When I first started shooting the 6 BR several years ago I tested Benchmark a lot. For me Benchmark was the best powder I ever shot in the 6BR, trouble was I was piercing primers in the test rifle. I moved away from Benchmark thinking that it was the problem. Turned out it wasn't the powder it was the rifle, the fireing pin hole was to large and allowing the primer material to flow back and creating the pierced primer. Sent the bolt to Gre-Tan and that was the end of that problem. I just settled in with RL15 and didn't look back, I would however like to retest with Benchmark in this case.
RS