Thanks Peter. My conundrum is that some bubba cut the cone just in front of the sight, leaving almost an inch of exposed barrel. I would like to try to save the sight itself. Heat would not be an issue since I will have to put a new finish on the rifle anyway.
I know this post is a year old but I just bought a no 5 mk1 yesterday, where a previous owner cut the cone off, I've checked and can't even find pins to remove....we're you ever successful at getting your sight off?