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Old April 18, 2013, 11:58 AM   #12
Senior Member
Join Date: September 2, 2009
Location: Interior Alaska
Posts: 154
One other point, there is a point (unknown to me) of diminishing returns when it comes to case capacity.

Consider the Colt Walker, 60 grains of (black) powder, .45 caliber. Modern "equivalent" is the 45 BPM - black powder magnum -

Compared to the .45 Colt:

50% more powder, how much higer velocity with the 250gr bullet?
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