Forget any diagrams Coyote
adjust the seater/taper-crimp operation to where the mouth becomes no less
than 0.469" and no more than 0.471". (it's
much easier than it might sound.)
Then do the classic "plunk" test with the dissembled barrel as here:
(turn the sound up and listen starting ~ 1:50)
http://www.youtube.com/watch?v=cdJLNox1hpk
"Plunk" is a measure of goodness right up there w/ "Bang!".