Dick Hosmer wrote on Mar 30^th, 2013 at 2:07pm:

. . . I'm guessing it is not the "what" that is at issue (simple enough to just not run the reamer in quite far enough) but the "why".

You're right as usual. I was tempted to write "how/why . . . " instead of "how one produces a "short chambered" Krag barrel". Short chambering a Krag barrel just doesn't make sense considering that the SAAMI minimum .30/40 cartridge is some .020" shorter head-shoulder than the minimum chamber and that's not where a rimmed design establishes headspace anyway.

I like reincarnated's approach and am curious to learn if the uninstalled Criterion barrel will accept a new .30/40 case up to the rim.