Got the bore out to .450" buy simply using a wooden dowel , cut a slot in one end and slot in a bit of 600 grt paper with a bit of thin plastic for backing, start at breech end, rod held with vice grips and in it goes with plenty of fluid , lathe at fast spin. Up and a few times and clean bore, then tap in lead slug to get size, at .450"-.457" , that will do it. Now have to machine taper the OD, muzzle at 1' and breech 1.130" for receiver . Would like to make it octagonal , so will have look at ways of doing it, could possible grind it, have to have look in my comeinhandy box. Homebrew.357., The K I S S way of doing it.
, Machining muzzle end to 1" for taper setting up.
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