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Rifles, Reloading, Optics, Equipment
Reloading
Using chronograph data to determine the best load????
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<blockquote data-quote="BountyHunter" data-source="post: 92963" data-attributes="member: 12"><p>Dan </p><p></p><p>You and I have had this discussion before. OCW is a good sytems for what it does, but it is not good at reaching the upper levels of accuracy. </p><p></p><p>I can fire 20-30 shots on a ladder and chrono and ID from 2-4 tuning nodes on my barrel. OCW cannot tell you if you have 1 or 10. I know where my pressure is going to jump normally, OCW cannot tell me that. After that it is a simple matter of picking the MV closest to my desired MV, (OCW cannot find that) and then tweaking minor powder adjustments in the middle of the node so I do not worry normally about pressure spikes from temp etc, neck tension and seating depth to get a load that shoots in the .2 and under. We all agree LR testing is required no matter what methodoligy you use.</p><p></p><p>I and most LR BR/LR shooters do not use the OCW methodoligy because it does not give us the accuracy levels we need w/o firing bunches of groups. It gives acceptable accuracy (.5 moa maybe even a little better on a good day) levels in most guns very quickly, but not the extreme accuracy levels (.0-.2). I can pick any components and get that, so OCW really will not tell me anything.</p><p></p><p>True most people and any factory gun should be happy with .5 MOA. I am with mine, but not LR BR or custom LR hunting rigs. </p><p></p><p>If someone is happy with .5, then by all means do it OCW and w/o chrono and be happy. If not, then suggest they try a ladder with a good chrono. </p><p></p><p>Until 1k BR/LR shooters starting using the OCW routinely, it seems that it is only a theory that it will work with extreme accuracy results. But best I can tell, that theory is not close to being proven at this time.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 92963, member: 12"] Dan You and I have had this discussion before. OCW is a good sytems for what it does, but it is not good at reaching the upper levels of accuracy. I can fire 20-30 shots on a ladder and chrono and ID from 2-4 tuning nodes on my barrel. OCW cannot tell you if you have 1 or 10. I know where my pressure is going to jump normally, OCW cannot tell me that. After that it is a simple matter of picking the MV closest to my desired MV, (OCW cannot find that) and then tweaking minor powder adjustments in the middle of the node so I do not worry normally about pressure spikes from temp etc, neck tension and seating depth to get a load that shoots in the .2 and under. We all agree LR testing is required no matter what methodoligy you use. I and most LR BR/LR shooters do not use the OCW methodoligy because it does not give us the accuracy levels we need w/o firing bunches of groups. It gives acceptable accuracy (.5 moa maybe even a little better on a good day) levels in most guns very quickly, but not the extreme accuracy levels (.0-.2). I can pick any components and get that, so OCW really will not tell me anything. True most people and any factory gun should be happy with .5 MOA. I am with mine, but not LR BR or custom LR hunting rigs. If someone is happy with .5, then by all means do it OCW and w/o chrono and be happy. If not, then suggest they try a ladder with a good chrono. Until 1k BR/LR shooters starting using the OCW routinely, it seems that it is only a theory that it will work with extreme accuracy results. But best I can tell, that theory is not close to being proven at this time. BH [/QUOTE]
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Reloading
Using chronograph data to determine the best load????
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