longcruise
70 Cal.
What did you use for a BC? Its under .07 according to Lyman.
I used .056. Hard to tell what accuracy these ballistics programs have for round balls.
Ballistic 4.13 documentation give a formula for deriving a BC for use in the British Round Ball Table. When I run it through 4.13, the .50 caliber ball zeroed at 100 yards has a drop of 72 feet at 550 yards with a starting velocity of 1900 fps. 1900 fps is the maximum velocity useable in the British Round Ball Table.