WiFowler I can't comment on the aluminum sleeve thing. But do know that Atkinson had a good reputation for those barrels. Sleeving actions supposedly stiffed them and made them potentially more accurate(?
I think that Marquart was more the action part of the build equation. I recall a couple of articles by him for Wolfe Publishing about getting bolt actions to feed properly.
Anyway, far as I know Bill Atkinson was a top rifle guy and well regarded. I think the barrels were cut rifled. They were located in Prescott AZ i think.
