I have a 25 year old 870 express 20 ga. With 26" barrel. I would like barrel shortened and to have it rethreaded for remchoke because I already own numerous chokes. Is there a gunsmith who can rethread the 20 for remchoke? I talked to sumtoy and he does not do 20 ga remchoke.
Rob Roberts does some in 20 gauge in Rem-choke. I think it depends on wall thickness after the barrel is cut. I have never used Rob Roberts but I have friends who have and they have all been happy with his work. If its too thin after cut you may be better off to just buy a shorter barrel and have two barrels. I think Carlsons also sells aftermarket Remington barrels as another option than just buying from Remington.
Mike Orlen.