I've noticed a number of SXS English guns that have had original barrels replaced with new barrels. Assume that's mostly due to thinning of the walls in older barrels or other reasons to be out of proof.

Is anyone in the US doing this kind of work?

I also have seen sleeved barrels (Including a Purdey for sale in Anchorage a while back.)

Who does this work in the US?

Merry Christmas all!