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Old February 3, 2013, 07:38 AM   #1
Senior Member
Join Date: March 20, 2009
Location: Norhthern Indiana
Posts: 307
BP pressures vs Smokless

I am trying to understand the supposed great difference in pressure between similar weighted bullets in black powder and smokeless loads. For example, if you loaded a 200 grn bullet in a 45 acp cartridge with a smokeless load that achieves 900 ft/second, how is the resulting pressure not virtually identical to loading a 200 grn conical in an 1858 Remington with enough BP to achieve 900 ft/second?
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