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post #4 of (permalink) Old 11-21-2012, 10:32 AM
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Location: SE-AK
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The formula for kinetic energy in generic terms is KE = 1/2 * (mass) * (velocity)^2, or 1/2 times the mass times the velocity squared. Reduced with all the proper conversion factors, it is KineticEnergy = .5 * weight * velocity^2 / 7000 / 32.175

Here's a good website: Bullet Kinetic Energy Calculator

So as it works out, your .30-30 has a KE at the muzzle of 1826ft-lbs, and your smokepole has a KE at the muzzle of 1122 ft-lbs. That being said, the roundball also has a "large slow moving punch" factor that makes it a good game-getter.

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