Good calculations, WA!! I'd make a few changes, but they would not change the outcome by enought to worry about.
tut, are we talking about striking the outside (I understood pit removal) or is back boring an option. I'd backbore if inside is an option. If you need backboring calculations, post back.
Both. Just checked and minimum barrel wall thickness is stout .043. Lots of things can be done to these barrels to lighten them, the only question is whether its worth paying the expense to back bore and recut the chokes. Would be interesting to see how much you could lighten them up by just going to the standard .662 (they are currently .655). You'd still have a ton of barrel wall thickness for sure and would just be bringing the barrels up to normal bore diameter for a 16.
