Ned,

I have no idea what Criterion uses for a reamer, but I'll bet dollars to Navy beans that it is a one-piece and has a throater for the 220 grain service load.  Just like the 6.5 Sweed ... if you buy a reamer from Clymer, you're stuck with that damned long throat for the old 160 grain RN service load, even if you all you want to shoot is 139 grain Lapua BT.  I learned that the hard way.

I will pull the barrel back out of the rafters and take some Stoney Point readings of the throat.  Yes, I have the special case for 30-40, and I'm pretty certain I have a small stash of Hornady 220 grain SP's from about 45 years ago.

Based on that quick test with the empty case, I would not run a finish reamer into the chamber for any reason.  If it turns out that the throat is shorter than desired (doubtful), a separate throater would be in order.  I did this with one of my K31's and it made a world of difference.  (Shhhh. Don't tell anyone on the Swiss boards.  I'll be keelhauled!) 

Resp'y,
Bob S.