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Long Range Hunting & Shooting
OCW Method
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<blockquote data-quote="Varmint Hunter" data-source="post: 1695708" data-attributes="member: 313"><p>I typically use a very unscientific approach. I review several reloading manuals, in print and on-line, for powders that have proven to work well in other rifles. While working up from a minimum charge to a (listed) maximum charge I look for accuracy and signs of excess pressure. If I find a good load that appears well within normal pressure limits I start to vary bullet seating depths to see if group size can be further reduced. I shoot all loads over a Oehler 35P and keep records of velocity and standard deviation.</p><p></p><p>If no charge seems to stand out as being potentially accurate then I just switch to another powder and start over.</p><p></p><p>I have also tried switching brass and primers to develop the best load but that has rarely been productive. The vast majority of my handloads are in Lapua cases with Federal match primers.</p><p></p><p>FWIW - I tried the OCW method on several occasions and found that results were often hard to duplicate. Thus, making it difficult to make valid conclusions from their results. Based on all that I've read on the internet, others have had different (more conclusive) results with the OCW method than I have.</p></blockquote><p></p>
[QUOTE="Varmint Hunter, post: 1695708, member: 313"] I typically use a very unscientific approach. I review several reloading manuals, in print and on-line, for powders that have proven to work well in other rifles. While working up from a minimum charge to a (listed) maximum charge I look for accuracy and signs of excess pressure. If I find a good load that appears well within normal pressure limits I start to vary bullet seating depths to see if group size can be further reduced. I shoot all loads over a Oehler 35P and keep records of velocity and standard deviation. If no charge seems to stand out as being potentially accurate then I just switch to another powder and start over. I have also tried switching brass and primers to develop the best load but that has rarely been productive. The vast majority of my handloads are in Lapua cases with Federal match primers. FWIW - I tried the OCW method on several occasions and found that results were often hard to duplicate. Thus, making it difficult to make valid conclusions from their results. Based on all that I've read on the internet, others have had different (more conclusive) results with the OCW method than I have. [/QUOTE]
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