Quote Originally Posted by 82boy

My understanding of it is the reamer cuts the chamber so that the bullet will be seated into the lands, and the barrel is head spaced for a certain rim thickness. I would say that this would defiantly lock you into a one brand of ammo.
You are correct - and you can't do it w/o moving the barrel back (no way to "shorten the throat" w/o setting the barrel back).

Lots of folks do this with factory Ruger 10/22 barrels because it is easy to set them back. Pretty hard to do with a Savage rimfire.