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Rifles, Reloading, Optics, Equipment
Reloading
Low SD but bad groups
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<blockquote data-quote="Orange Dust" data-source="post: 2491624" data-attributes="member: 92702"><p>Like I said, when working up a load I don't and highly doubt if you actually fire enough of load A to determine if it is statistically more accurate than load B. If you are shooting @ 100 yds, 3 shot groups, and you get .330, .430, .496 which is more accurate? Actually they all shoot good so it doesn't matter which one you pick for a hunting load, but you have no idea from the data which is more accurate. The sample size is too small and the groups are too small. The further away you shoot I personally feel the more meaningful the groups will be. Reasons are there is more dispersion so it is easier to see the difference between loads, and you, or I will anyway concentrate harder to shoot a good group. I do all my load workups @ 300yds. The reasons are simply because that is my current 0 distance, I can easily see bullet holes that far, that's where my bench is etc. I feel it would be even more meaningful twice that far, but I am not set up for it. About the only testing I do that approaches having meaningful statistics is .22LR. Have a couple that shoot pretty well and we test ammo by shooting 5, 10 shot groups @ 100 yds. Personally I think this is enough to determine if one lot of ammo is more accurate than another, but I might be wrong. It is a good number since everything gets shot up and nothing is wasted. Your mileage may vary.</p></blockquote><p></p>
[QUOTE="Orange Dust, post: 2491624, member: 92702"] Like I said, when working up a load I don't and highly doubt if you actually fire enough of load A to determine if it is statistically more accurate than load B. If you are shooting @ 100 yds, 3 shot groups, and you get .330, .430, .496 which is more accurate? Actually they all shoot good so it doesn't matter which one you pick for a hunting load, but you have no idea from the data which is more accurate. The sample size is too small and the groups are too small. The further away you shoot I personally feel the more meaningful the groups will be. Reasons are there is more dispersion so it is easier to see the difference between loads, and you, or I will anyway concentrate harder to shoot a good group. I do all my load workups @ 300yds. The reasons are simply because that is my current 0 distance, I can easily see bullet holes that far, that's where my bench is etc. I feel it would be even more meaningful twice that far, but I am not set up for it. About the only testing I do that approaches having meaningful statistics is .22LR. Have a couple that shoot pretty well and we test ammo by shooting 5, 10 shot groups @ 100 yds. Personally I think this is enough to determine if one lot of ammo is more accurate than another, but I might be wrong. It is a good number since everything gets shot up and nothing is wasted. Your mileage may vary. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Low SD but bad groups
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