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formula for ft/lbs is 1/2 mvv/ 32.16

(Mass is grams of bullet divided by 7000)

(Mass is grams of bullet divided by 7000)

e = 1/2 * m * v * v

In a simplified version, it is :

e= ( Bullet(grains) * Velocity(fps) * Velocity(fps) ) / 448000

That is, multiply the weight of the bullet by the velocity, and again by the velocity, then divide the WHOLE THING by 448000. It will give you the foot pounds of energy.

For example, taking a 180 grain bullet at 3000 fps (Weatherby, for ex). With the 32.174 rounded off to 32, you will get 3616 ft.lbs instead of the 3598 ft.lbs with the 450240 (and 3596.5 ft.lbs with K=450436).

They are basically all the same.... 3600 ft.lbs.... Of course, one could argue that the gravity might be a a little different in my neck of the woods ! :lol:

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