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I agree on the velocity's "Importance" given for the FPE formula,

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Imo for thick skinned game, velocity is the least important factor. Bullet weight, calibre and construction far more important.

Tried some examples ....


.308 X 150grs X 3500fps = 161,700

.510 X 570grs X 2000fps = 581,400


OK maybe the velocity in the formula isn't as dramatically skewed as I first thought. After trying some examples.

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I stand by my statement that the Velocity is VITALLY important for the FPE formula as I said.
That formula was used to show an advantage for high velocity ctgs. compared to lower velocity rounds of the same diameter - ie: WTBY's. We ALL know that bullet weight, construction and diameter are just as, if not more important than velocity.
The FPE formula is not a good one for 'showing' killing power. We also all (I would hope) know that to be true.
A .22-250 with a 40gr. HP bullet produces the same FPE as a .45/70 BP round with 500gr. bullet. I know which one I would rather have for moose and bear shooting. There are so many such comparisons one could make.

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Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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