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Old December 1, 2012, 04:11 PM   #8
polyphemus
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Join Date: June 24, 2012
Posts: 417
Because bullet depth affects internal cartridge pressure,and in the .45 ACP
.010" makes a considerable difference,this also takes into account the amount of and type powder used and primer cap to achieve desired projectile velocity.
Boyle's Law if you like Physics.
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