Go the other direction, i.e., how much barrel wall at the muzzle do you have after the reboring? I think JES says he needs .100" on each side but others say .125". (So, if you're going from 30-06 to 35 Whelen, the suggestion is you need to have a muzzle barrel OD of .558" to .608".)
The candidate barrel is 0.550" at the muzzle. Using the 0.250" minimum remainder rule of thumb, could go up to 30 caliber. However, really just want a 6mm or 6.5mm bore diameter to accommodate a .243 Win, or 6.5x55 Swede. Appreciate the input folks...
