Delta Gun Shop/Clearwater Reboring does handgun barrels.
A couple of the top handgun custom gunsmiths use Jim DuBell there for this service. He's done a couple for me and they are top notch.
Clearwater Reboring Prices
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Classic Barrel Works doesn't adv. handgun barrel work but a quick email will settle that. They do custom handgun work so perhaps they do.
Dan Peterson is the owner/gunsmith and he has an excellent reputation for his work.
Classic Barrel Works
Reboring/rerifling is a common way to get the barrel you want when converting revolvers to larger calibers.
There are limits due to existing barrel diameter of course,,but a rebore from 357 to 44sp is a common conversion on S&W N frames.
Be ready to wait in most cases for the completed work to arrive. Backlogs of 6mo to a year are not uncommon for the few 'smiths that still do this type of work.
Another is J.E.S. Rifle Reboring. Here's his website. Looks like rifles are a specialty but you never know. I don't see an email for him either.
He's usually on one of the rifle forums (Marlin?) answering questions, etc.
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