Jim,
One thing to consider: the high speed steel reamers aren't going to like cutting casehardened steel recievers. I don't have a solution for that other than annealing the whole reciever or somehow annealing the area around and in the hole.
Chuck, I"m not a machinist so excuse the question if it doesn't make sense.
I thought the idea behind case hardening is to only harden the top few .001's inches of the receiver to protect it against wear, the inside should still be softer. Would a reamer really have that much difficulty cutting through those few .001's inches?
