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Long Range Hunting & Shooting
7 saum unexpected velocity
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<blockquote data-quote="rscott5028" data-source="post: 638877" data-attributes="member: 24624"><p>Your data doesn't add up. </p><p>You may have multiple problems... with JBM and/or the chrony</p><p>e.g. Scope height, 100yd zero, scope clicks, powder scale, chrony itself</p><p> </p><p>If you throw out your cold bore/fouling shot, what was your ES and Standard Deviation? i.e. were the chrony readings all over the place? Or, just one or two outliers? ...perhaps muzzle blast too close to the chrony</p><p> </p><p>How many shots did you record and were they all within a short period or throughout the day? </p><p> </p><p>Did lighting change e.g. clouds vs sun during the chrony session? </p><p> </p><p>Are you letting some of the cartridges sit in the sun or hot chamber which would increase MV? </p><p> </p><p>Do you have a known good load/rifle to fire across the chrony as a baseline? </p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 638877, member: 24624"] Your data doesn't add up. You may have multiple problems... with JBM and/or the chrony e.g. Scope height, 100yd zero, scope clicks, powder scale, chrony itself If you throw out your cold bore/fouling shot, what was your ES and Standard Deviation? i.e. were the chrony readings all over the place? Or, just one or two outliers? ...perhaps muzzle blast too close to the chrony How many shots did you record and were they all within a short period or throughout the day? Did lighting change e.g. clouds vs sun during the chrony session? Are you letting some of the cartridges sit in the sun or hot chamber which would increase MV? Do you have a known good load/rifle to fire across the chrony as a baseline? -- richard [/QUOTE]
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7 saum unexpected velocity
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