Re: Gre_tan tooling and fixtures
If I understand you right, when you ream it out to .705 using the bushings that fit the reamer and your action you're just opening up the raceway so you can bush the bolt. You're also providing a known inside dim for an arbor to index the rest of the machining off of (cutting the threads, facing the action and lugs).
So, what do you index in before this initial ream? The reamer with the spacers on it? If so, then Dave's question (as I read it) is still open - does the Gre-Tan tooling address any alignment problem between the outside surface of the action and the bolt raceway?
(I don't know how important that is in reality, this is just my favorite topic - truing actions)
Thanks for any insight.