[shaunx]

Is there a simple blackpowder ballistics calculator out there?

One Of My Freind built a 4 bore, rifled wall gun, and he would like to see what sort of energy it's generating. Aside from knocking the shooter around a bit!

We're using a 500 grain charge of 1f, 1675 grain lead roundball, and a .015ticking patch. One shot taken over a Chrony clopcked at 1853 fps.

[Vermonter]

http://www.remington.com/products/ammunition/ballistics/

Lower right part of screen links to the calculator.