Hi, I have built approx ten rifles (all Mausers) using Adams and Bennett barrels, and have yet to find one that wouldn't shoot under an inch with the proper bedding,loads,trigger,etc.etc. I like E.R. Shaw and Shilen barrels, but have not noticed any better accuracy with them! I do think the bores on the A&B barrels are a little rough, but it usually doesn't make much difference in accuracy, only cleaning!
Thanks for listening,
Ken