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Old March 7, 2009, 10:45 PM   #1
kenfa03
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Muzzle energy

Is there a formula for calculating muzzle energy. I presume I would need a chronagraph?
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Old March 7, 2009, 11:25 PM   #2
cgaengineer
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Yes to be accurate in figuring for your loads you will need a Chrony.
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Old March 8, 2009, 12:47 AM   #3
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Divide the velocity by 1000 and square it, multiply that number by the bullet weight in grains, multiply that number by 2.219. This is the energy in foot pounds.
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Old March 8, 2009, 01:38 AM   #4
kraigwy
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KE = V Sq * w /450240

W = bullet weight in grains

V= velocity

KE would be your muzzle energy,

This is the fomular showned in the Lvman reloading manuel and the fomular the army uses.
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Old March 8, 2009, 06:24 PM   #5
kenfa03
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Thanks. Which chrony would be recommended for new reloader on a budget?
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Old March 8, 2009, 08:01 PM   #6
cgaengineer
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I Chrony brand chrony will cost you about $100 for a cheap one.
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Old March 9, 2009, 08:43 AM   #7
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Speer manual #11 has a table for calculating muzzle energy. I bet you could google the same info.
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