Can somebody tell me how to calculate the BC for a bullet please?

cap

A very ambitious and controversal project. Google "Ballistic Coefficient Calculator" and take your pick. IMHO the only truly accurate way is by chronographing at two known distances to get the actual velocity loss and going from there. The easy way is to call the bullet maker and ask them.

Ray

Here's a great site....the first input is Bc but if you click there is a library that pops up. Pretty neat site...

http://www.eskimo.com/%7Ejbm/ballistics/traj/traj.html