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Old July 28, 2013, 12:33 PM   #9
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Join Date: April 18, 2011
Posts: 509
Originally Posted by engineglue:
One formula I wanted to use is; penetration equals bullet weight times velocity divided by the diameter of the nose of the bullet divided by five. I don't really have the resources to acquire the data needed to make a chart which utilizes this formula.
The formula you propose sounds an awful lot like Vernal Smith's equation for bullet penetration in wetpack- basically momentum divided by velocity and a scaling factor....

Penetration (inches) = Bullet Weight (lbs) x Impact Velocity (fps) / Meplat Diameter (inches) / 5

...found here

It's not bad for being as simple as it is- linear equations have a certain robustness that seems to compliment their simplicity.
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