Originally Posted by keith
In comparing the "Before" and "After" chamber dimensions, I'm just curious how reaming out the chamber to .450 BPE could accomplish REDUCING the diameter of the chamber at the case mouth from .490" to .479", REDUCING the chamber diameter in front of the rim from .550" to .545", and also REDUCING the rim thickness from .060" to .040"

A reamer that deposits metal in addition to removing it is indeed a remarkable thing!
Hello keith,
Thanks for the reply.
The illustration is an overlap using an existing 450bpe cartridge drawing - to merely illustrate the removal of the sweeping taper in the center of the existing chamber. Fortunately the rental reamer was also a "put-on" tool. wink

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