I have an opportunity to pick up a 450 Rigby chamber reamer - new with a removable pilot. The one interesting part is that it has the word "Match" stamped on the shank. I realize a reamer that is ground to Match dimensions is probably a good thing but why would a big bore like the 450 Rigby need a Match chamber? (The seller cannot answer this question, FWIW.)

match usually mean minimum spec

jeffe