hellier0437 Posted May 12, 2007 Report Share Posted May 12, 2007 just wondering how you can calculate the muzzel energy of a rifle in ft lbs if you have a velocity and a pellet width. i could do it in joules (with 1/2 m v^2) but how do you do it in ft lbs? thanks for any help Quote Link to comment Share on other sites More sharing options...
THAIBOXER Posted May 12, 2007 Report Share Posted May 12, 2007 just wondering how you can calculate the muzzel energy of a rifle in ft lbs if you have a velocity and a pellet width. i could do it in joules (with 1/2 m v^2) but how do you do it in ft lbs?thanks for any help HI PELLET WEIGHT IN GRAINS X VELOCITY(FT/SEC) X VELOCITY(FT/SEC) DIVIDED BY 450240 Eg. 16.00 X 650 X 650 / 450240 = 15.014215 FT/LB I THINK? THEREFORE ROUGHLY..... .22 A 16GRAIN PELLET @ 581 FT/SEC IS 12 FT/LB .22 A 14.3GRAIN PELLET @ 614 FT/SEC IS 11.97 FT/LB DON'T HOLD ME TO THESE FACTS CHAP BUT THATS HOW I DO IT WITH MY CHRONY. Quote Link to comment Share on other sites More sharing options...
hellier0437 Posted May 12, 2007 Author Report Share Posted May 12, 2007 thanks a lot B) Quote Link to comment Share on other sites More sharing options...
tikkamark Posted May 12, 2007 Report Share Posted May 12, 2007 That formula seems to work out fairly accurately Quote Link to comment Share on other sites More sharing options...
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