Re: need a good gunsmithing lathe????? What brand
I was trained by a Master Machinist who was apprenticed during WW2, so i was taught to form and grind my turning tools out of HSS and even how to heat treat tool steel when HSS was unavailable for tooling. I have used modern throw away carbide tooling and its very fast and convenient, exactly that, it needs high speeds and feeds to function properly because it shears the material rather cuts it.
Every thing you need to do in barrel fitting can be done with HSS tooling, especially on a manual lathe. A well ground 60 degree threading tool can be dropped into gear, and the minutest slither of material can be removed from your barrel thread at slow speed, or even revolving the chuck by hand, you cant do that with carbide.
Using HSS tooling might be slow but you have much more control over what you are doing and its also cheaper.
Single point screwcutting can be quite scary, watching your tool heading for the u/cut shoulder, you need to stop the machine and wind out very quickly but it is very rewarding to see your completed thread with a beautifull finish, no tears and a class 1 fit.
The tooling you will need for chambering on your lathe should consist of a face plate, headstock centre, driving dog and steady, turning and single point tools, screwcutting gauge and of course measuring tools.
for the tailstock end; a dead centre, piloted centre drill, step drills, a tap wrench to hold your reamer, chamber reamer and a DTI for final accurate head spacing of the chamber, dont forget your head space gauges for that calibre.
I am telling you all this when i have never chambered a barrel, but in my 27 years as a master machinist i have compleated many similar and much more complicated reaming and boring jobs, then i care to remember.
I am only to willing to pass on any information or tips and tricks of the trade that i know so please do not hesitate to ask anything you want and remember this moto; "If in doubt, ask".