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Old July 5, 2007, 03:31 PM   #2
Scorch
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Join Date: February 13, 2006
Location: Washington state
Posts: 15,248
The long answer is-
You calculate the energy any load has the same way-
1/2 the bullet weight in pounds X velocity squared
divide by
32 (acceleration of gravity)
This formula gives a number in foot-pounds of energy.

Lighter, faster bullets generally win in this situation, since velocity is squared.

But there is also
Weight x velocity = momentum
where heavier bullets win due to the fact that they are harder to stop and therefore penetrate more.

There are 2 variables: bullet weight and velocity, SO . . .

If the bullet weight is higher at the same velocity, energy will be higher.
If the bullet weight is higher at lower velocity, energy can be lower or higher, depending on velocity.
If the bullet weight is lower at the same velocity, energy will be lower.
If the bullet weight is lower at the same velocity, energy will be lower.

So, the short answer to your question is that the second load is traveling a lot slower than the first load, therefore has less energy.
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