I have a mid. 1800,s Blisset (Liverpool) 17 bore double with a broken nipple. My first idea for removal is to mill out most of the old one and try to pick out the remaining threads. I am leery on applying heat because of the soft solder joining the barrels. I would appreciate any suggestions from someone who has faced this job themselves. Also has anyone re-tapped old Damascas
nipples.Thanks