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Rifles, Reloading, Optics, Equipment
Reloading
Can SD and ES be a shortcut for accuracy
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<blockquote data-quote="groper" data-source="post: 413702" data-attributes="member: 12550"><p>In short, you MUST have a good ES and SD as a prequirement to an accurate long range load. You MUST ALSO have good accuracy in terms of group size which may not have anything to do with ES or SD, but more likely barrel harmonics or bullet types and seating depths.</p><p></p><p>The reason ES and SD is important, is huge vertical impact variation at long range due to the muzzle velocity differences.</p><p></p><p>In your circumstance, you can still develop a good long range load at 100yds by shooting your groups at 100yds THRU a chronograph at the same time. If you see very tight groups (accuracy) and the chrono is giving you very low ES and SD numbers with the tight groups, youve found a load with great long range potential and then you can take it your long range shooting spot and test it there at distance.</p><p></p><p>If you get good SD ES numbers but the accuracy is poor, then you need to keep trying different seating depths or powder/primer combinations before wasting your time and heading out to your long range spot.</p><p></p><p>make sense?</p></blockquote><p></p>
[QUOTE="groper, post: 413702, member: 12550"] In short, you MUST have a good ES and SD as a prequirement to an accurate long range load. You MUST ALSO have good accuracy in terms of group size which may not have anything to do with ES or SD, but more likely barrel harmonics or bullet types and seating depths. The reason ES and SD is important, is huge vertical impact variation at long range due to the muzzle velocity differences. In your circumstance, you can still develop a good long range load at 100yds by shooting your groups at 100yds THRU a chronograph at the same time. If you see very tight groups (accuracy) and the chrono is giving you very low ES and SD numbers with the tight groups, youve found a load with great long range potential and then you can take it your long range shooting spot and test it there at distance. If you get good SD ES numbers but the accuracy is poor, then you need to keep trying different seating depths or powder/primer combinations before wasting your time and heading out to your long range spot. make sense? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Can SD and ES be a shortcut for accuracy
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