How would the lighter inside the barrel work? I know heat makes metal expand and cold makes it contract. Wouldn't you want to heat up the end of the barrel and then that would expand loosening the grip on the choke tube? If you heat up the inside of the choke tube wouldn't that just make it tighter?
The reason I ask is because I just recently bought a beater mossberg 500 for 75 bucks that has a choke tube stuck/rusted in place. I've tried soaking it but haven't gotten to budge yet.
It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived.
If you can remove the barrel,heat the inside like "JTL" said.Now here the trick that works for me on all rusted parts. Pure bee's wax! Never fails. Get the choke tube hot enough for the wax can flow inside the threads.
I know it sounds stupid, but the Rem Lube with teflon is probably they best penetrating lube I've seen short of Liquid Wrench. Spray a pile on and let it sit overnight. Can't tell you how many fasteners that has removed for me.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.