Gotta response from brux yesterday.
They gave me a number and offer to field any questions at my convenience. I couldnt say enough nice things about these guys. We must have talked for a half hour and they were more than willing to disclose how and why they do things. Pretty rare these days.
Long story short, the man informed me he knows of only one way to accurately measure runout/straightness of a rifle bore. Cut it up and check runout at the ends of the sections. He assured any other method involves an assumption or reference.
When i asked him to estimate the worst, typical, and best run out he has seen from a run of barrels. He said he has seen terrible barrels run as much as .02-.03, he felt his production barrels that go out run around .004, and that a really good barrel would probably check .001-.002". He stated that barrels that came close or exceeded .01 would be thrown out.
He also said the ends of his barrels typically run .001 or better.
He added the barrel steel in a production run would be the primary factor in causing run out if the barrel maker has good tools and machines.
After this he went on to state a little arc probably has very little affect on how a barrel shoots. He felt twist and bore/groove diameters were much more responsible for a rifles accuracy and things that he also pays very close attention to.
He went into a lot of detail on why he believes this and even on his experiences that have re inforced these beliefs and i gotta say i couldnt argue with him.
After the phone call and things ive heard in passing, im probably gonna push the boss to let me try a few brux tubes on future builds.
