What shank size does it need to be? Does the 1.25" not work with that action?Also just noticed in one of your earlier posts you said you were thinking 32" on the barrel? You're going to need a carbon barrel to make weight and I'm not sure I've ever seen one that long. In a proof, for that shank size, your only option is 375 caliber and that one is only 30" and it's still over 6 pounds.