Boring & rifling...

[S.R.Custom]

I have a Ruger blackhawk barrel in .357 caliber that I'd like to have bored and rifled to .44 caliber. Anyone here know of anybody that does that?

[Doughty]

I think "deltagunshop.com" in Colville, WA might do that sort of thing.

[Johnw...ski]

I haven't tried them yet but these guys do it.

Barrel Reboring / Chambering

http://www.cutrifle.com/

John