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Rifles, Reloading, Optics, Equipment
Reloading
Single digit E.S. dont mean squat.
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<blockquote data-quote="Culpeper" data-source="post: 2879054" data-attributes="member: 12583"><p>You're correct but I think you are going further than the average reloader is able to do.</p><p></p><p>I was only limiting to the variables that a Chrono calculates. But based on my experience it takes 30+ shots to get into the 90% confidence level. We are not working with a sufficient population to pull a reasonable sample from to begin with so we are not really sampling. You're getting into Statistics 101. </p><p></p><p>A 10 shot string shot with a Chrono is a way to predict the population size that has yet to be reloaded. But to simplify we can calculate confidence and the higher the better. </p><p></p><p>You obviously know what you are doing. I worked auditing with random and then later statistical sampling. The latter required special software. But in every case we always had a large population to start with. If we had 5000 rounds of factory match ammo and randomly selected the required sample size for confidence then we would compare that to the factory specifications, which was calculated using sampling to begin with. With a Chrono we are trying to achieve this without a population for reloading. Example, with 30 shots on the Chrono we are only hoping with some level of confidence that the next 1000 reloads will give similar results, statically speaking only. It's a prediction.</p></blockquote><p></p>
[QUOTE="Culpeper, post: 2879054, member: 12583"] You're correct but I think you are going further than the average reloader is able to do. I was only limiting to the variables that a Chrono calculates. But based on my experience it takes 30+ shots to get into the 90% confidence level. We are not working with a sufficient population to pull a reasonable sample from to begin with so we are not really sampling. You're getting into Statistics 101. A 10 shot string shot with a Chrono is a way to predict the population size that has yet to be reloaded. But to simplify we can calculate confidence and the higher the better. You obviously know what you are doing. I worked auditing with random and then later statistical sampling. The latter required special software. But in every case we always had a large population to start with. If we had 5000 rounds of factory match ammo and randomly selected the required sample size for confidence then we would compare that to the factory specifications, which was calculated using sampling to begin with. With a Chrono we are trying to achieve this without a population for reloading. Example, with 30 shots on the Chrono we are only hoping with some level of confidence that the next 1000 reloads will give similar results, statically speaking only. It's a prediction. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Single digit E.S. dont mean squat.
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