RE: Safety with Spanish and American Barrels in general
since Iam a conical and roundball shooter, most my new rifles get broke in with maxi ball and roundball. Like Sabotloader said, the Green Mountain Barrels I bought so far were smooth and ready to shoot. I did still do the J-B bore paste on them if for no other reason then to make sure it was nice and clean before I started. The new CVA Stalker coming has a 1-32 twist so I will be shooting conical out of it anyway.
Good point though. I never thought of it the way you put it.