Bertram Brass

[ken s]

ken,
just because r & d, or anyone else for that matter, made the reamer, does not mean the chamber is to original dimensions.
no original chamber I have seen would allow finger seating of a 410 bullet in a fired case, and you could not chamber a round with a 410 bullet loaded.
if don, zack or orville , correct me on this I will have to eat my words.
the cartridge was an almost generic one in the day, commonly used by many companies for mid range target and hunting rifles.
it was known for reliable accuracy and was a basic workhorse chambering.
it came from the bore diameter pp era, and was supplanted by greaser groove diameter chamberings like the 40/65 later in the era.
you just can't have it both ways.
even if your new chamber is to original dimensions, the rifle is still not original.
a piece of history has gone forever.
keep safe,
bruce.