Learning How To Be a Marksman – Part 3, by Tunnel Rabbit

(Continued from Part 2.) Understanding Ballistic Coefficients As a rule of thumb, projectiles with a ballistic coefficient (BC) of 0.400 or less and velocities of less than 2,750 fps (such as 77 grain .223 bullets out of 20″ AR barrel) will have a much more difficult time striking targets past 600 yards when compared to projectiles with greater ballistic coefficients and the same or higher velocities. The larger diameter projectiles with heavy for caliber bullets used in other cartridges beginning with 6mm ARC, or .243 Winchester can have higher ballistic coefficients and the same or greater velocities. Therefore they are …

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