Cool calculator Steve, thank you for that! I guess I'd need to confirm what the units of measurement were to use it? (Thousandths and ounces?) I do know from working with English guns that the constant honing of pits over many decades and owners can produce some frightfully light tubes. I certainly don't want to go that far. This is also an older American 20, so the pressures involved would make me need a substantial margin to be comfortable. I am also considering lengthening the forcing cones (which might already happen by back-boring it in the first place?). I'll be working with a very competent and safe 'smith (Terry Nicholson) so I'd expect that he'll keep me honest.
Dan, I must have missed that article. Nine ounces off of even a 3 1/2 lb set of tubes is pretty substantial. Like what? 20%? Sounds like a good way to make #3 barrels on a Fox weigh more like #4s.
Last edited by Lloyd3; 02/19/16 03:07 PM.
