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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity and harmonics
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<blockquote data-quote="groper" data-source="post: 416017" data-attributes="member: 12550"><p>a short answer to your original question would be simple. There is no way 20fps ALONE would cause impact 2inches lower, it would go against the laws of physics otherwise. Something OTHER THAN velocity HAS TO cause this POI shift.</p><p> </p><p>In my experience, i have reproduced similar phenonmenons myself, the reasons are often mysterious BUT, in the end there IS always a reason.</p><p> </p><p>Did you shoot the groups with BOTH loads on the same day, at the same time, same barrel temperature?</p><p> </p><p>Tell us more about this rifle, what type of barrel is on it length, profile etc is it bedded and free floated or uses foreend pressure etc?</p></blockquote><p></p>
[QUOTE="groper, post: 416017, member: 12550"] a short answer to your original question would be simple. There is no way 20fps ALONE would cause impact 2inches lower, it would go against the laws of physics otherwise. Something OTHER THAN velocity HAS TO cause this POI shift. In my experience, i have reproduced similar phenonmenons myself, the reasons are often mysterious BUT, in the end there IS always a reason. Did you shoot the groups with BOTH loads on the same day, at the same time, same barrel temperature? Tell us more about this rifle, what type of barrel is on it length, profile etc is it bedded and free floated or uses foreend pressure etc? [/QUOTE]
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