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Rifles, Reloading, Optics, Equipment
Reloading
Load Development Interpretation
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<blockquote data-quote="Mike D Texas" data-source="post: 2526744" data-attributes="member: 71221"><p>I can't help but think the Magnetospeed is affecting groups as well as POI. Much like a tuner if it isn't in an area of the harmonics that the barrel likes, it's going to be difficult to get repeatable groups. I wouldn't be too upset at the velocity/ES/SD variances you are seeing with a new barrel and new brass. </p><p></p><p>In addition to that Berger load data tends to be very conservative. Let your rifle and brass tell you what it likes. Personally I strive for 99-102% case fill and typically have lower deviations in ES (which is much less important as mentioned earlier) and SD. </p><p></p><p>Here's an example of where you can have low ES and SD but it's definitely not the norm. </p><p></p><p>[ATTACH=full]364945[/ATTACH]</p><p></p><p>Unfortunately it appears to be a wee bit overpressure based on nearly pierced primers, although ejector marks are pretty light to my eyes. Case fill on this one was at 103%. </p><p></p><p>[ATTACH=full]364946[/ATTACH]</p></blockquote><p></p>
[QUOTE="Mike D Texas, post: 2526744, member: 71221"] I can’t help but think the Magnetospeed is affecting groups as well as POI. Much like a tuner if it isn’t in an area of the harmonics that the barrel likes, it’s going to be difficult to get repeatable groups. I wouldn’t be too upset at the velocity/ES/SD variances you are seeing with a new barrel and new brass. In addition to that Berger load data tends to be very conservative. Let your rifle and brass tell you what it likes. Personally I strive for 99-102% case fill and typically have lower deviations in ES (which is much less important as mentioned earlier) and SD. Here’s an example of where you can have low ES and SD but it’s definitely not the norm. [ATTACH type="full"]364945[/ATTACH] Unfortunately it appears to be a wee bit overpressure based on nearly pierced primers, although ejector marks are pretty light to my eyes. Case fill on this one was at 103%. [ATTACH type="full"]364946[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Load Development Interpretation
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