Jon,
Thanks for relating your experience. I just measured the walls and got between .045-.049" . These barrels are HEAVY. I wouldn't feel goosey about taking .010" a side off.
That might make enough weight difference to make the effort worth it to me.

In searching for "the" gun, considered; ability to use modern pressure ammo, cost, single trigger, ejectors, quality of construction, durability, weight. The BSS doesn't have the weight I was hoping for but has the other requirements covered. With a BSS being a relative bargain, I can put a little money into it and not feel too bad. Besides, nothing I found that was near what I was looking for was anywhere near whatever I could put into a BSS.