Choose the appropriate bullet of your gun type for the ballistic coefficients.
Bullet Name
Diameter inches
Weight grains
Sectional Density
Ballistic Coefficients
.308 dia. (.30-30) 150 gr. FN
.308
150
.226
.185 @ 2400 fps and above .224 between 2400 and 1800 fps .265 @ 1800 fps and below
For your convenience, here are Adobe Acrobat PDF versions
of both the Rifle And Handgun Ballistic Coefficients, that you can download
and print out to update your manual or use as a reference.