BC – Ballistic Coefficient

Its shape and weight influence a bullet’s ballistic coefficient (BC). Bullets that are long, heavy, and pointed have high BCs. They travel further and are more resistant to wind drift than short, lightweight bullets with low BCs. A higher BC means the bullet is more streamlined and will perform better in accuracy over longer distances. For example, the .300 Win Mag, 30-06 Springfield, and .308 Win are all similar due to the diameter of the bullet, which is .308 inches, and they are all .30 calibres.

CALIBREBULLET WEIGHTBCVELOCITY FT/S
.243 Win80gr.4443300
.270 Win135gr.6493000
.308 Win140gr.5652950
.308 Win165gr.6362700
6.5 Creedmoor140gr.6222800
6.5 Creedmoor130gr.5642906

The BCs of the table were measured using standard ammunition types. However, one must also consider the velocity to assess the ability to maintain momentum.