I would go with Manson's Bentz reamer...it's smaller in diameter and shorter than a standard chamber design, but loose enough compared to a true match reamer that you can use a variety of ammo without major effort in chambering.  It was designed for use in a semi-auto rifle, like the Ruger 10-22, so has to work with little or no closing power like a bolt action would give.  I use it as my primary .22 l.r. reamer.

David