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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet lethality: energy and velocity
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<blockquote data-quote="Ronald W Schaefer" data-source="post: 1903441" data-attributes="member: 109378"><p>I usually refer to Optimum Game Weight charts by Ed Matunus, <strong>Lymans 47th <a href="http://i.viglink.com/?key=35af182e557f38b9a204def9ffc32e18&insertId=dbd172e655fc2d90&type=M&exp=60%3ACI1C55A%3A7&libId=ka9sds0w01015pxt000DAknpoqbh0&loc=https%3A%2F%2Fwww.xdtalk.com%2Fthreads%2Fmatunas-game-weight-formula.212801%2F&v=1&iid=dbd172e655fc2d90&opt=true&out=http%3A%2F%2Fwww.brownells.com%2Freloading%2Findex.htm&ref=https%3A%2F%2Fwww.bing.com%2Fsearch%3Fq%3DEd%2BMatunas%2Boptimum%2Bgame%2Bweight%2Btable%26form%3DPRUSEN%26pc%3DUE01%26mkt%3Den-us%26httpsmsn%3D1%26msnews%3D1%26rec_search%3D1%26refig%3D6bf45767fb914077ba585fcf87584a91%26sp%3D-1%26pq%3Ded%2Bmatunas%2Boptimum%2Bgame%2Bweight%2Btable%26sc%3D1-36%26qs%3Dn%26sk%3D%26cvid%3D6bf45767fb914077ba585fcf87584a91&title=Matunas%20Game%20Weight%20Formula%20%7C%20Springfield%20XD%20Forum&txt=%3Cspan%3EReloading%3C%2Fspan%3E" target="_blank">Reloading</a> Manual</strong></p><p>or the Taylor index. A lot of brain bytes went into those concepts. There is a lot of discussion out there based on anecdotal evidence, often supported and sometimes poo-poohed that says you need to hit an animal with enough velocity to have the bullet expand to create a sufficient wound channel ( a lot of mfgr these days tell you what that velocity is) and 1000 ft Lbs of energy on deer sized animals and 1200 ft. pounds on Elk size animals to impart the necessary hydrostatic shock to "drop" the animal. So you can figure out the range that corresponds to those numbers for the cartridges you're using and when you get down to those numbers that is supposedly your max range then for an ethical kill. There are, as well posted here, a lot of variables and easy to get over analytical so that's why I stick to the "common sense" rules above. For the record, I try to get as close to the critter as I can and wait for a good steady shot...so far I have an Elk at 500 yds with 7mmRM using 180 gr Berger (that's as close as I could get due to canyon between us) and 475 yds on Mule deer same situation with 7mm-08 and 145 gr Barnes LRX. I would have preferred a 100 yd shot<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />! FYI, for most of the rifles I shoot these days I hit the "minimums" at about 600yds. I have bigger, just don't like carryin' 'em anymore.</p></blockquote><p></p>
[QUOTE="Ronald W Schaefer, post: 1903441, member: 109378"] I usually refer to Optimum Game Weight charts by Ed Matunus, [B]Lymans 47th [URL='http://i.viglink.com/?key=35af182e557f38b9a204def9ffc32e18&insertId=dbd172e655fc2d90&type=M&exp=60%3ACI1C55A%3A7&libId=ka9sds0w01015pxt000DAknpoqbh0&loc=https%3A%2F%2Fwww.xdtalk.com%2Fthreads%2Fmatunas-game-weight-formula.212801%2F&v=1&iid=dbd172e655fc2d90&opt=true&out=http%3A%2F%2Fwww.brownells.com%2Freloading%2Findex.htm&ref=https%3A%2F%2Fwww.bing.com%2Fsearch%3Fq%3DEd%2BMatunas%2Boptimum%2Bgame%2Bweight%2Btable%26form%3DPRUSEN%26pc%3DUE01%26mkt%3Den-us%26httpsmsn%3D1%26msnews%3D1%26rec_search%3D1%26refig%3D6bf45767fb914077ba585fcf87584a91%26sp%3D-1%26pq%3Ded%2Bmatunas%2Boptimum%2Bgame%2Bweight%2Btable%26sc%3D1-36%26qs%3Dn%26sk%3D%26cvid%3D6bf45767fb914077ba585fcf87584a91&title=Matunas%20Game%20Weight%20Formula%20%7C%20Springfield%20XD%20Forum&txt=%3Cspan%3EReloading%3C%2Fspan%3E']Reloading[/URL] Manual[/B] or the Taylor index. A lot of brain bytes went into those concepts. There is a lot of discussion out there based on anecdotal evidence, often supported and sometimes poo-poohed that says you need to hit an animal with enough velocity to have the bullet expand to create a sufficient wound channel ( a lot of mfgr these days tell you what that velocity is) and 1000 ft Lbs of energy on deer sized animals and 1200 ft. pounds on Elk size animals to impart the necessary hydrostatic shock to "drop" the animal. So you can figure out the range that corresponds to those numbers for the cartridges you're using and when you get down to those numbers that is supposedly your max range then for an ethical kill. There are, as well posted here, a lot of variables and easy to get over analytical so that's why I stick to the "common sense" rules above. For the record, I try to get as close to the critter as I can and wait for a good steady shot...so far I have an Elk at 500 yds with 7mmRM using 180 gr Berger (that's as close as I could get due to canyon between us) and 475 yds on Mule deer same situation with 7mm-08 and 145 gr Barnes LRX. I would have preferred a 100 yd shot:-)! FYI, for most of the rifles I shoot these days I hit the "minimums" at about 600yds. I have bigger, just don't like carryin' 'em anymore. [/QUOTE]
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Bullet lethality: energy and velocity
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