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The Range
Ammo & Reloading
Range Report - First 9mm reloads with chrono data
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<blockquote data-quote="swampratt" data-source="post: 3390945" data-attributes="member: 15054"><p>Overcast skies will lead to bad readings or error.</p><p>I have removed my sky screens and I have better luck.</p><p>One friend on another forum eliminated all errors and gets perfect readings every time.</p><p></p><p></p><p>What he did was mount the Chrony upside down No sky screens but the chrony is supported by the rods.</p><p>And the rods are now the legs and are mounted into a 2x2 foot piece of plywood painted white.</p><p>Think about that for a minute.</p><p></p><p>Works flawlessly ..</p><p>Now I feel your issue could be the chrony is too close to the barrel.</p><p>I had to move mine out 20 foot minimum from the muzzle to get good consistent readings.</p><p>10 feet was too close for my .308.</p><p>42gr Varget behind 168gr bullet does not go 3800 fps from an18" barrel .308.</p><p></p><p>If I am not mistaken the 30-06 military ammo velocity was based on data from 76 feet from the muzzle.</p><p></p><p>I got froggy a few times and placed my Chrony at 100 yards to get velocity at that distance.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3390945, member: 15054"] Overcast skies will lead to bad readings or error. I have removed my sky screens and I have better luck. One friend on another forum eliminated all errors and gets perfect readings every time. What he did was mount the Chrony upside down No sky screens but the chrony is supported by the rods. And the rods are now the legs and are mounted into a 2x2 foot piece of plywood painted white. Think about that for a minute. Works flawlessly .. Now I feel your issue could be the chrony is too close to the barrel. I had to move mine out 20 foot minimum from the muzzle to get good consistent readings. 10 feet was too close for my .308. 42gr Varget behind 168gr bullet does not go 3800 fps from an18" barrel .308. If I am not mistaken the 30-06 military ammo velocity was based on data from 76 feet from the muzzle. I got froggy a few times and placed my Chrony at 100 yards to get velocity at that distance. [/QUOTE]
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Range Report - First 9mm reloads with chrono data
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