A little blue Loctite, or Vibratite VC3.
Alternately, you can just check it regularly when shooting to make sure it doesn't walk off.
You can buy a replacement barrel that is not threaded, or you could have a competent 'smith lop the threaded end off your barrel and re-crown it.
Alternately, you can just check it regularly when shooting to make sure it doesn't walk off.
You can buy a replacement barrel that is not threaded, or you could have a competent 'smith lop the threaded end off your barrel and re-crown it.