SKU - .376 HPR This is a standard .376" chucking reamer, to which I add a convenient way to turn it by hand via the star knob handle pinned to it.
Relatively few hinge pin holes require reaming for the oversize pins, but for those few that do, this is the tool you need for the job.
I do not recommend buying the reamer until you have determined that you need it. In other words, it is not mandatory you have this reamer in order to use the oversize pins, so there is no point in getting it unless you need it. Until you do, save your money for other items here that you need more or for more powder, primers, and bullets.
NEVER ATTEMPT TO REAM THE HOLES WITH THE BARREL INSTALLED ON THE FRAME. The lead on the end of the reamer will tend to "egg out" the barrel hinge pin hole and make it oversize, potentially ruining the hole. Ream either the frame holes or the barrel hinge pin hole separately. Also use a good tapping/Cutting oil or our soon to be released custom blended hinge pin oil works great.