But in reality, these numbers have no significance outside of an Armourers shop. If you were in one now, you'd simply but carefully file away the 8565 and 84 number, make good and put the bolt back on the shelf for another needy rifle on another day. Every Armourer has done it a zillion times.

I don't quite understand what you're getting at by your 'forced match' comments. We don't 'force match' anything so far as I know or recall........