I'm not going to answer directly because it's a little mathematical and has been covered extensively by professionals. Do some research and you can get the formulas. Best is to take the inflated advertised BC's and adjust from there. BC's are becoming things of the past and now we are using Drag Coefficients from Doppler Radar. You match your bullet with these and they will get you out past the transonic range. I guess I'm one of those guys that thinks I'm Tacticool.. I guess the old school Kentucky Windage is more accurate. If you can dial and can have more precision in your shooting that's a bad thing?... that's referring to someone's other lame post.