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Rifles, Reloading, Optics, Equipment
Reloading
chrono,accuracyi
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<blockquote data-quote="J E Custom" data-source="post: 415584" data-attributes="member: 2736"><p>It's not so much the difference from round to round but the accuracy of the numbers that</p><p>will tell you what you realy need to know.</p><p></p><p>I will share a couple of examples that convinced me that it realy makes a difference how </p><p>accurate the chronagraph is.</p><p></p><p>First - A frend of mine has a 30/338 lapua improved. After some load testing it was exceeding </p><p>loading velocities with no sign of pressure. If he had loaded up to pressure signs it would have </p><p>exceed the SAAMI pressure for that round. but with an accurate chronograph he knew he was</p><p>loading high pressure loads even though there were little or no signs of excessive pressure.</p><p></p><p>Another example was while testing a custom 17 HMR with A custom barrel the listed velocities</p><p>from the ammo maker was exceeded by 60 ft/sec ,and as we all know the listed velocities are</p><p>normally inflated. so having a stock factory rifle in 17 HMR I decided to chronograph the same</p><p>ammo in the factory rifle, The results were withen 10 ft/sec of the factory listed velocities (they</p><p>were Lower).</p><p></p><p>If it is very accurate it will give you confidence in your ammo and improve the accuracy of your</p><p>untested drop charts. (Beyond the test range distances).</p><p></p><p>An inaccurate tool is not worth very much, but an accurate tool is invaluable !!!</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 415584, member: 2736"] It's not so much the difference from round to round but the accuracy of the numbers that will tell you what you realy need to know. I will share a couple of examples that convinced me that it realy makes a difference how accurate the chronagraph is. First - A frend of mine has a 30/338 lapua improved. After some load testing it was exceeding loading velocities with no sign of pressure. If he had loaded up to pressure signs it would have exceed the SAAMI pressure for that round. but with an accurate chronograph he knew he was loading high pressure loads even though there were little or no signs of excessive pressure. Another example was while testing a custom 17 HMR with A custom barrel the listed velocities from the ammo maker was exceeded by 60 ft/sec ,and as we all know the listed velocities are normally inflated. so having a stock factory rifle in 17 HMR I decided to chronograph the same ammo in the factory rifle, The results were withen 10 ft/sec of the factory listed velocities (they were Lower). If it is very accurate it will give you confidence in your ammo and improve the accuracy of your untested drop charts. (Beyond the test range distances). An inaccurate tool is not worth very much, but an accurate tool is invaluable !!! J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
chrono,accuracyi
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