This calculator is another exclusive feature from Beartooth Bullets, you will not find it anywhere else. It generates a relative penetration index for any given bullet. It derives it's information based on the bullet's weight and frontal area of the nose. The index number generated does not represent inches of penetration, but rather provides a very precise tool for comparing the penetration potential of any two non-expanding bullets. To utilize this tool for expanding bullets, you must first determine the anticipated diameter of the bullet after expansion.

Penetration is only one aspect of terminal performance, but couple this information with that of our wound channel calculator, and you will have a very realistic idea of what to expect in the way of terminal performance when comparing bullets, loads and cartridges.

Unlike the Thorniley Relative Stopping Power Calculator, we are unable to accurately quantify what expected penetration would be in game, as muscle density and bone mass varies so much one species to another. However, you do get a very concise picture of the potential of penetration, one bullet compared to another. We trust you will find this tool both useful and insightful.

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