Tungsten carbide inserts will work fine for threading and crowning. I had a well drilled through 200 feet of solid granite using a WC bit. The hard part would be messing with the chamber because most chamber reamers are HSS.
Yep. I had LongRifles whack 4" off the AAC 260 barrel and recrown it before screwing it onto my action. Chad acted as if it was no big deal to do when I called him about it.