Hi! I'm trying to reload cast bullet ammo formy old , last, No.4. It's well worn and i'm going to reload cast bullet for him. How could slug the bore and throat?
I used old trick : a fishing plumb on yhe muzzle forced with a wood dowel to the chamber and measured it... Now i do not remeber exact results but what i shalll consider ?? Diameter between land or diameter between grooves ( that is bigger)?

And...last but not least how could i bore the throat?
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