Breech plug won't budge

[TexiKan]

Ha! The breech plug on my Sharon Hawken rifle kit, which was purchased in the early '80's, came with an over torqued one on the barrel. For those who have not worked with one of their kits, the flats needed significant filing to get them to be smooth. I could not budge the breech, which did not line up with the barrel flats. I took the barrel to a friend who had better equipment and we could not budge it even after heating it up quite a bit. I finally gave up and filed the breech and the barrel flats to line up. I have never been able to remove it after all of these years yet it remains my primary gun.