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  1. Impact studies
    Just a brief bit of data to help you select your ammo. With spheres, a 25% increase in diameter doubles the volume. So moving from 8mm to 10mm doubles the volume of your projectile, which of course doubles the weight. Next item is density. Here are a few: Glass: 2.4 Steel: 7.82 Lead: 11.35...
    energy lead marble momentum rufus steel
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