I just checked on getting that Ruger Redl Label 20 threaded and it's $100 a barrel + shipping and that does not include any choke tubes. Instead I think I'll just hone it out to I/C and Mod since I have the honing tools. Only trouble with that is, it leaves you with very little forcing cone left.
I bought a new 870 .410 3" when they first came out with them back in the early '70's. I bought it as a second gauge gun for my Mexico hunts. I spent the month of February 1973 at a friends Rancho on the El Fuerte River N/W of Los Mochis, Sinaloa.
I would shoot my 12 ga. one day and the .410 the next to keep my shoulder from getting too sore. I learned years before that it's no fun no matter how good the shooting is when your shoulder looks like a purple onion!
That was a great trip that year, Bucky Emmick and I shot over 5,500 rounds that hunting trip. Mostly white-wing doves, but a lot of ducks, black bellied tree ducks, blue pigeons and three species of quail. The best eating (and my Mexican hosts favorite) was the black ibis......very tasty.
Paradise in Mexico is having tons of ammo and a un-plugged gun!
Dave