So, I randomly stumbled across this thread via a Google search so I decided I'd follow up on my earlier posts.
I have long since had my .375 CheyTac completed (XLR stock, Stiller Tac408 action, Proof Research Barrel, Jewel trigger, LRA bipod) and it's a shooter to say the least. .25 MOA is effortless and I typically run in the 0.15 range. The weight is fantastic and it looks sexy as hell. To answer a previous post, shooting strings has no effect. I only have two magazines so I am limited to 10 shot bursts but in so doing, the groups do not wander at all. This sort of abuse, however, is not something out of which I want to make a habit so it was a one time deal....
I liked the build so much that I am addicted. I now have a .300 Win Mag with a Stiller action and Proof barrel that delivers the same performance. In fact, I have a .300 WSM
and a .308 under construction now and both are using Proof barrels. I am a true believer to say the least.