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Old January 29, 2008, 08:27 PM   #6
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Join Date: September 8, 2007
Location: Mississippi
Posts: 14,155
I don't have a graph I can show you, maybe somebody else does. BP is an explosive not a propellant so it would be IMHO a sharp spike. The recommended charge for a golf ball mortar or cannon is 40 - 60 grs.
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