Kroil is what we typically use at Scott's Gunsmithing.Take melnics advice. And liquid wrench is marginally better than wd-40 but still not the right stuff. I've migrated to kroil. I am more cavalier about heating. I use a propane torch. I am also used to heating metal with much more aggressive means, so take that for what it is worth. Keep the torch moving constantly. Focus on the area where the threads are. If you have a temp gun, keep the part at or below 250.
Once you get it out, make friends with antiseize.
Uh, you might want to go back and edit the original post rather than telling someone that maybe they shouldn't have followed your advice is a subsequent one.The solder on modern shotguns is high temp. If this is a real oldie (which would almost certainly be a fixed choke not a tube) disregard my advice.
When I have used the high temp (atf compliant) stuff, I've done it with oxyacetylene. Installed muzzle devices on a couple of saigas that way (they were cut down).
Liquid Wrench > KroilThanks for the feedback/suggestions. Just ordered some kroil. Will let it soak for a while. And then into the freezer chest
Liquid Wrench > Kroil
Good questions! Purchased used barrel - browning bps deer/turkey. Deer slug choke extends 5 inches, might end up just using it as a slug barrel and leave it alone! My own chokes, use plenty of grease, no problemOP - have you had this exact choke tube out before? Just wondering what the history is here with the choke tube. For instance, was the gun purchased used and for all we know the choke has been in there since it was manufactured or did you have it out of the gun last month before deciding to go with a modified choke for those rascally clays.
Is the choke extended or flush fit. If it is extended, don't think I would hesitate to use some channel locks and a rag after applying a small amount of heat to it.
I took out a flush fit modified choke on my Benelli after it has been in there for several years and that was a PITA. I put grease on almost every choke before I screw it in now.
Good old BPS. My dad bought one for me for Christmas when I was 8 years old. Think it was 1979 and the BPS had just come out. I have a 26" IC fixed choke barrel, 30" full choke barrel, and a Hastings fully rifled barrel for it. Hunted and shot with it for quite a while, until I bought a Browning Citori Lightning POS when I turned 18. Actually went halvsies on the Citori with my dad.Good questions! Purchased used barrel - browning bps deer/turkey. Deer slug choke extends 5 inches, might end up just using it as a slug barrel and leave it alone! My own chokes, use plenty of grease, no problem