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Hunting
Long Range Hunting & Shooting
Energy or bullet diameter most important?
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<blockquote data-quote="Greyfox" data-source="post: 1235156" data-attributes="member: 10291"><p>This is s discussion that has been going on for well over a century. I think John Taylor's Knock "Knick Out Value" concept which assumes a solid bullet still has relavance today. </p><p></p><p>(Bullet weight X Bullet Diameter X Velocity) / 7000 = Knock Out Value</p><p></p><p>He believed ithat a value of at least 60 was needed to knock out an elephant with a properly placed bullet to the head. I like to use this formula using the velocity "at the target". A value of "10" for deer sized game and "15" for elk sized game. While it doesn't account for bullet expansion I think it does account for sufficient penetration energy to reach and damage the vital organs and has served me well as a guideline. The formula gives credence to velocity, bullet weight, and diameter to effectively take game. IMO.</p><p></p><p>For example, 1000 yards is my max range for deer with my 6.5x284. (1850FPS X .264 X 142) / 7000= 9.9 Knock Out Value. </p><p> My 300WM load produces a value of 15 at 1000 yards. (1800FPS X .308 X .210) / 7000.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1235156, member: 10291"] This is s discussion that has been going on for well over a century. I think John Taylor's Knock "Knick Out Value" concept which assumes a solid bullet still has relavance today. (Bullet weight X Bullet Diameter X Velocity) / 7000 = Knock Out Value He believed ithat a value of at least 60 was needed to knock out an elephant with a properly placed bullet to the head. I like to use this formula using the velocity "at the target". A value of "10" for deer sized game and "15" for elk sized game. While it doesn't account for bullet expansion I think it does account for sufficient penetration energy to reach and damage the vital organs and has served me well as a guideline. The formula gives credence to velocity, bullet weight, and diameter to effectively take game. IMO. For example, 1000 yards is my max range for deer with my 6.5x284. (1850FPS X .264 X 142) / 7000= 9.9 Knock Out Value. My 300WM load produces a value of 15 at 1000 yards. (1800FPS X .308 X .210) / 7000. [/QUOTE]
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Energy or bullet diameter most important?
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