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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
# of Shots per Group and MOA - Results
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<blockquote data-quote="LRNut" data-source="post: 1943895" data-attributes="member: 3230"><p>What are the odds of flipping a quarter and having it land "heads" three time in a row? One in eight. In other words, every eight times you run through this exercise, you would expect to see this once. The odds of flipping it five times all heads is once in 32. Now, as guys like SpeedEngineer know, a coin flip is a binomial distribution whereas bullet group size is normally distributed. But the same concept applies: if you only shoot a three shot group that plunks into 1/4 inch, you might be misleading yourself, esp if very similar loads (1/2 grain of powder on either end of the "magic" load, for example) group 1 MOA. I do shoot three shot groups when I develop loads, but I verify "good" ones by following up with another at least one day later. I then measure the group size of all six shots.</p></blockquote><p></p>
[QUOTE="LRNut, post: 1943895, member: 3230"] What are the odds of flipping a quarter and having it land "heads" three time in a row? One in eight. In other words, every eight times you run through this exercise, you would expect to see this once. The odds of flipping it five times all heads is once in 32. Now, as guys like SpeedEngineer know, a coin flip is a binomial distribution whereas bullet group size is normally distributed. But the same concept applies: if you only shoot a three shot group that plunks into 1/4 inch, you might be misleading yourself, esp if very similar loads (1/2 grain of powder on either end of the "magic" load, for example) group 1 MOA. I do shoot three shot groups when I develop loads, but I verify "good" ones by following up with another at least one day later. I then measure the group size of all six shots. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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# of Shots per Group and MOA - Results
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