a few years ago there were a few posts on removing seized chokes in the barrel. A general search provided nothing could some one provide some information in how they or someone removed seized choke without damage to the barrel
put an old 2x4 on the end, and wack it with a hammer towards the receiver. Pops it loose each time I've done it.
Soak it with Blaster then heat it with a hair dryer then give your choke tube wrench a sharp rap with small hammer Worked for me ! Billy
Kroil also, purchased a stopper from the hardware store , insert in choke end of barrel, safely support barrel upside down, insert 1/3 of a can of Kroil, let sit 24 hrs, pour Kroil out, remove stopper, install choke wrench, tap with rubber hammer if needed, if that doesn't loosen it, gently apply heat with a hair dryer, try again with wrench and rubber hammer. Kroil will penetrate to one millionth of an inch as per specs on the can. From now on, remove choke tube after shooting , I like to put a minute bit of anhydrous graphite, "Gunslick" makes an excellent version, on the choke tube when you install ,and you will never have a problem again.
100 Straight Products Inc seized choke tube removal tool. www.100straight.com Bruce Bowen Sturgis South Dakota
soak the end of the barrel in some good penetrating oil for a couple of days. With the barrel in a gun vice, Heat the barrel along the sides where the choke is to get it hot. (Obviously, not red hot) You will see the oil smoking. Put ice cube in the end of the choke, I got some pipe to make a good T handle for the choke wrench and unscrew it. It will squeak like hell, but I have gotten several out of customers guns this way.
when all else fails, I have a tool that will remove a stuck 12 gage choke tube and leave the barrel unharmed. It's called a bolt extractor and it works slickly for removing tubes.
Remington supplied a 4 lug choke tube wrench with there Express model that had a 3/8" hole that allowed a ratchet to be inserted. My son and I fought with a frozen choke tube for 3 days using the above methods. Using a sliding socket bar with a 3/8" lug and some profanity we cranked it out relatively easy. Made some dying demon sounds. I think the previous owner used Red Loctite. Local shooter tried using a very large EZ Out type tool from a plumber. Not only tore up the choke tube but distorted the muzzle. Barrel finally went to Briley for repairs. Be careful.