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March 7, 2009, 11:45 PM
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#1 |
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Member
Join Date: January 19, 2009
Posts: 71
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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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March 8, 2009, 12:25 AM
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#2 |
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Senior Member
Join Date: November 6, 2008
Posts: 264
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Yes to be accurate in figuring for your loads you will need a Chrony.
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March 8, 2009, 01:47 AM
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#3 |
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Senior Member
Join Date: December 10, 2005
Location: Central , OR
Posts: 1,888
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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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March 8, 2009, 02:38 AM
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#4 |
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Senior Member
Join Date: June 16, 2008
Location: Wyoming
Posts: 11,060
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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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March 8, 2009, 07:24 PM
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#5 |
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Member
Join Date: January 19, 2009
Posts: 71
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Thanks. Which chrony would be recommended for new reloader on a budget?
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March 8, 2009, 09:01 PM
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#6 |
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Senior Member
Join Date: November 6, 2008
Posts: 264
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I Chrony brand chrony will cost you about $100 for a cheap one.
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March 9, 2009, 09:43 AM
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#7 |
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Senior Member
Join Date: January 23, 2008
Location: Arsenal of Democracy
Posts: 405
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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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