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Standard barrel shank diameter on standard calibers are 1.055" x 20tpi. On the large shank it is 1.120" x 20tpi. The barrel nut is also bigger in internal size, but is the same outer diameter and the barrel nut wrench will still fit.
Thanks, That is what I needed to know. I will re-thread my Large shank barrel to the standard size shank. The standard actions are a dime a dozen where as the large shank actions are hard to find.