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Old 10-02-2012, 22:54   #10
Taterhead
Counting Beans
 
Join Date: Dec 2008
Location: Boise, Idaho
Posts: 3,086
Quote:
Originally Posted by awdxtc View Post
well according to underwoords sight the 155gn tmj is listed at 1500fps and 775 lbs of energy. Your math is incorrect.

Energy = .5 * weight * velocity^2 / 7000 / 32.175
My math is correct. So is yours. You are using the mfg box flap velocity. drsjr1969 is using his chronographed number.

Try plugging the measured velocity of 1551 fps rather than the box flap velocity of 1500.
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