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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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<blockquote data-quote="Bart B" data-source="post: 1132073" data-attributes="member: 5302"><p>All this talk of load workup is interesting. </p><p></p><p>I've never worked up any load for 308 Win or two 30 caliber magnums with Sierra or Lapua match bullets across different makes of match barrels. Just used the same loads the winners did. Accuracy tests with them equalled theirs. One exception was for a new Sierra match bullet for which no data was available.</p><p></p><p>Being a firm advocate of shooting enough shots per test group to have at least 90% confidence of representing the accuracy all rounds for that recipe will have, I've concluded that 100 people given the same components and rifle shooting one 5-shot group with several combinations and assemblies, there'll be 100 "most accurate" loads and no two alike.</p><p></p><p>Regarding the above link's tests with 3-shot groups. People who've shot dozens of 3-shot groups in controlled conditions (indoors with free recoiling rifles) have groups with the largest one 4 to 5 times bigger than the smallest. And the first one shot is seldom the smallest one and all group centers aren't at the same place. Most folks think otherwise; one 3-shot group'll be the same size and at the same place as several of them.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1132073, member: 5302"] All this talk of load workup is interesting. I've never worked up any load for 308 Win or two 30 caliber magnums with Sierra or Lapua match bullets across different makes of match barrels. Just used the same loads the winners did. Accuracy tests with them equalled theirs. One exception was for a new Sierra match bullet for which no data was available. Being a firm advocate of shooting enough shots per test group to have at least 90% confidence of representing the accuracy all rounds for that recipe will have, I've concluded that 100 people given the same components and rifle shooting one 5-shot group with several combinations and assemblies, there'll be 100 "most accurate" loads and no two alike. Regarding the above link's tests with 3-shot groups. People who've shot dozens of 3-shot groups in controlled conditions (indoors with free recoiling rifles) have groups with the largest one 4 to 5 times bigger than the smallest. And the first one shot is seldom the smallest one and all group centers aren't at the same place. Most folks think otherwise; one 3-shot group'll be the same size and at the same place as several of them. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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