Have this old sewer pipe muzzleloader barrel in 50 cal and would like to eventually have it bored to 58 cal and twisted to a 1 in 70 rate.
My measurements are ;
Barrel is 1 inch straight.
Groove is close enough to call .510.
Measured all dovetails and rib holes and the deepest is .135.
By my math I can take it out to a possible .620. am I rite or have I missed something?
Man this winter needs to be over or find a wheelbarrow full of spending money.