You can AI it your self.Rent a reamer and you put it on an extension and do it right through the action.Takes about ten minutes.No problems with feeding.I have done 10 336s like this with no problems.Gains?? 50 -150 FPS depending on bullet used.
Its all right to be white!!
Stupidity left unattended will run rampant
Don't argue with stupid people, They will drag you down to their level and then win by experience
| 
