Sure, If you have a smith set it back and re-chamber, it will take roughly an inch of the overall length. This would be the time to have the barrel threaded as he will have it free from the receiver to chamber it on the lathe. On a factory barrel the bore to the OD are never perfectly symmetrical so they usually thread with a support (center) in the muzzle end to thread concentric to the bore and not the OD of the barrel. After this he will probably re-crown to clean up where the center was riding in the end of the bore. This is easy work for anyone with lathe knowledge, but the chamber cutting is why you are paying a gunsmith to do the work. Also you can choose from many chamber dimensions depending on the reamer used. I would (assume) "haha" that 17hmr has not developed as much attention to different reamer dimensions as 22LR has. 22lr is used in competition world wide and has had every gun guru in the world come up with a chamber dimension for improving accuracy. The 17HMR is inherently accurate and not a wide spread competition round, so I doubt this has got much attention.