Quote:My apologies, Matthias.....you gave me no leave to call you familiar.
Not at all! I didn't use my full name until I got old enough to start fighting with bureaucracies, so I grew up being "Thias" and still am to familly and friends. Shucks I guess you guys must qualify.
mgreenfield - 1/3 or even lower for a projectile that is the same weight and material. If you are going from stone to lead would you believe 10-12%! The coefficient of drag is cut by 1/2 to 3/4. Then you have to take surface area into account. A 2:1 lead glans is about 1/2 the diameter of a "spherical" stone so the projected area is around 75% smaller - with an equivalent impact on drag.
Calculated ranges for the three examples given above are (60m/s,45deg):
- Spherical rock (100g,41.7mm diameter) 185m
- Spherical lead (100g,25.6mm diameter) 262m
- 2:1 Ellipsoid lead (100g,20.3mm*40.6mm) 324m
Matthias