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Rifles, Reloading, Optics, Equipment
Reloading
Question on verifying velocity
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<blockquote data-quote="Litrfoot" data-source="post: 1905717" data-attributes="member: 108596"><p>A couple of things, the data published in those books are based on the "lot number" of the bullets tested, this can change somewhat by lot number over time. Also barrel twist can have an effect on weather the full potential of the published BC can be realized. Using the Litz engine and custom BC within those APPs should be quite accurate. No matter, If your going to use G7, I would shoot from 100 to 1300 Yards and record the data and then adjust the G7 BC to best reflect your results. Data must be trued to your load and rifle. Magneto speed is very accurate so I would say your speed data is valid.</p><p></p><p>Now all that being said both rifles performing the same in like conditions, you might be experiencing variations to environmental effects. These could include left Vs.right crosswind, tail Vs. headwind, these conditions can affect POI, leading to the misconception that your bullet speed and/or BC is off. The answer to this problem would be to test in early morning in calm conditions. Also a kestrel with AB will give you better data output compared to phone based platforms, using the AB engine. The data from the kestrel will be more accurate because its looking at actual environmental conditions.</p><p></p><p>Bottom line, test again in calm conditions and weigh that against the first test. Also if you have a friend that has an AB kestrel have him/her build a profile for your load and check it against your phoned based data.</p><p></p><p>Hope this helps, good luck.</p></blockquote><p></p>
[QUOTE="Litrfoot, post: 1905717, member: 108596"] A couple of things, the data published in those books are based on the “lot number” of the bullets tested, this can change somewhat by lot number over time. Also barrel twist can have an effect on weather the full potential of the published BC can be realized. Using the Litz engine and custom BC within those APPs should be quite accurate. No matter, If your going to use G7, I would shoot from 100 to 1300 Yards and record the data and then adjust the G7 BC to best reflect your results. Data must be trued to your load and rifle. Magneto speed is very accurate so I would say your speed data is valid. Now all that being said both rifles performing the same in like conditions, you might be experiencing variations to environmental effects. These could include left Vs.right crosswind, tail Vs. headwind, these conditions can affect POI, leading to the misconception that your bullet speed and/or BC is off. The answer to this problem would be to test in early morning in calm conditions. Also a kestrel with AB will give you better data output compared to phone based platforms, using the AB engine. The data from the kestrel will be more accurate because its looking at actual environmental conditions. Bottom line, test again in calm conditions and weigh that against the first test. Also if you have a friend that has an AB kestrel have him/her build a profile for your load and check it against your phoned based data. Hope this helps, good luck. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Question on verifying velocity
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