I am not an expert by any means so take my input with a grain or two, maybe even a shaker full of salt.  I have a jar of barrel anti-seize compound I bought at Sinclair when changing barrels on my 6ppc which I did several times a month for several years.  It is called Tru-Gard and is an anti galling thread protector but does not give the ingredients.  It looks somewhat like teflon paste with more additives.  We torqued our barrels pretty good and this compound made changing back to a practice barrel easy.  I have to believe somebody with the experience of J Louis that teflon tape might have worked just as well but I never saw it used in the centerfire BR game in my brief experience.  Tape would have been less messy as I always cleaned my chamber lugs after using the paste to make sure any surplus was removed before shooting.  Tom

No it is whitish blue like teflon with some blue ingredient added.  It states for stainless steel barrels to prevent galling of the threads.

I would hate to get my gun up to 600 degrees.
I have Teflon pads on my rifling machine ways and sine bar. That way I can use structural steel instead of going with something that has been hardened and polished. Has not given me any trouble in 16 years.

BTW I must have laid down square yards of Turcite in my early career in machine tools. Wonderful stuff.  Did you build your own machine, or rebuild one, John?   

Phil

Built it from scratch with an idea in my head, no plans. some of the parts I had sitting around for years waiting to be put to good use. When I got fired from my job I put everything together and it got me started in business. I didn't have a rack and pinion for the sine bar so I used roller chain and sprocket. The spindle that holds the barrel is made from a 4X4 front axle housing. It's all mechanical with automatic indexing. Reverse on the carriage is accomplished with a snowmobile boggy wheel. It was originally set up to run the carriage back and forth automatically but the cutter adjustment is still by hand so I took that feature off. Takes about 1/2 hour to cut rifle a barrel. It will cut 2,3,4,5,6 and 8 groove but I have never done 2 or 3. The 5 groove was the last added for doing early 1873 Winchester barrels.