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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Chronograph Procedure — Help?
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<blockquote data-quote="Bang4theBuck" data-source="post: 2953908" data-attributes="member: 73596"><p>Also be sure that the temperature of your ammo is closely managed for consistency. Here are things that can affect temperature of ammo which can affect velocity, depending on powder:</p><p>1. As mentioned above, loading a round in the chamber and leaving it in there for more than the amount of time it takes to get in target and pull the trigger.</p><p>2. Loading from a magazine when the rifle is hot. Ammo hests up by convection/proximity to heat from barrel. I always single feed when doing load development. I recommend you do this. </p><p>3. Letting ammo sit in the sun. Keep it in the shade or covered. </p><p>4. Differences in powders and powder lots within the same powder type. You never said what powder the cartridges were loaded with that would be good to know. </p><p></p><p>Good news is you are already in the 'pretty darn good range' for velocity with a 215, ES, and accuracy. Practice with technique and some of the other things above, including reloading fireformed brass might really get your into the sweet spot without much more effort. </p><p></p><p>Keep us posted.</p></blockquote><p></p>
[QUOTE="Bang4theBuck, post: 2953908, member: 73596"] Also be sure that the temperature of your ammo is closely managed for consistency. Here are things that can affect temperature of ammo which can affect velocity, depending on powder: 1. As mentioned above, loading a round in the chamber and leaving it in there for more than the amount of time it takes to get in target and pull the trigger. 2. Loading from a magazine when the rifle is hot. Ammo hests up by convection/proximity to heat from barrel. I always single feed when doing load development. I recommend you do this. 3. Letting ammo sit in the sun. Keep it in the shade or covered. 4. Differences in powders and powder lots within the same powder type. You never said what powder the cartridges were loaded with that would be good to know. Good news is you are already in the 'pretty darn good range' for velocity with a 215, ES, and accuracy. Practice with technique and some of the other things above, including reloading fireformed brass might really get your into the sweet spot without much more effort. Keep us posted. [/QUOTE]
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Chronograph Procedure — Help?
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