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hunting rifle accuracy
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<blockquote data-quote="Maol" data-source="post: 2745818" data-attributes="member: 98340"><p>Guess I would have to agree with the basic premise, but how you get to 30 is important too. For a hunting rifle most bench work is more about load development. Once you have your loads and seating figured then the bench work will give you your inherent accuracy. 30 is a pretty good number to get your rifle's dispersion number. Should it be 2 shots 15X? Or 3 shot groups 10X? 5 round groups 6X? 3 groups of 10? Maybe 2 groups of 30? Or my favorite, which is 30 rounds at 1 cold bore per day every day? </p><p></p><p>I would argue that they all have value, some more than others, but all should be measured and recorded. What I find most useful tends to vary by each rifle. To illustrate what I am talking about, all groups letting the rifle come back to ambient temp in between groups; I have one rifle that isn't worth shooting a group of 4 or more, another that the number is 5 or 6. After that their dispersion is way up there. </p><p></p><p>Using the average distance from center of the group for each group to get the number to compare, it is much lower for the first rifle with 10 groups of 3 than it is with 6 groups of 5. In fact it is more than double shooting groups of 5, growing from .2 to .75 distance to group center for 30 shots. While the second rifle the dispersion number between 10 groups of 3 or 6 groups of 5 is about half as much, it only grows from .3 to .5. If I shoot the second rifle for three groups of 10 it really opens up to .8 inches from group center measured over 30 shots.</p><p></p><p>You can bet your pay check on those 2 308s. In normal conditions at 100, they are both sub .5 MOA for the cold bore shot from the point of aim. </p><p></p><p>Ain't that great? Now what good is a hunting rifle from a bench? In the end it's cold bore shots in the field, from field set ups that fill the freezer.</p><p></p><p>So those are the 30 that matter. Take one shot a day, and only one, for a month. Do it from the same position every day no matter the conditions. increase range by 100 every day to your max range then start over. Next month use a different position, and the next month another. At the end of a year you will know what that rifle can do, and you'll know what you can do with that rifle.</p></blockquote><p></p>
[QUOTE="Maol, post: 2745818, member: 98340"] Guess I would have to agree with the basic premise, but how you get to 30 is important too. For a hunting rifle most bench work is more about load development. Once you have your loads and seating figured then the bench work will give you your inherent accuracy. 30 is a pretty good number to get your rifle's dispersion number. Should it be 2 shots 15X? Or 3 shot groups 10X? 5 round groups 6X? 3 groups of 10? Maybe 2 groups of 30? Or my favorite, which is 30 rounds at 1 cold bore per day every day? I would argue that they all have value, some more than others, but all should be measured and recorded. What I find most useful tends to vary by each rifle. To illustrate what I am talking about, all groups letting the rifle come back to ambient temp in between groups; I have one rifle that isn't worth shooting a group of 4 or more, another that the number is 5 or 6. After that their dispersion is way up there. Using the average distance from center of the group for each group to get the number to compare, it is much lower for the first rifle with 10 groups of 3 than it is with 6 groups of 5. In fact it is more than double shooting groups of 5, growing from .2 to .75 distance to group center for 30 shots. While the second rifle the dispersion number between 10 groups of 3 or 6 groups of 5 is about half as much, it only grows from .3 to .5. If I shoot the second rifle for three groups of 10 it really opens up to .8 inches from group center measured over 30 shots. You can bet your pay check on those 2 308s. In normal conditions at 100, they are both sub .5 MOA for the cold bore shot from the point of aim. Ain't that great? Now what good is a hunting rifle from a bench? In the end it's cold bore shots in the field, from field set ups that fill the freezer. So those are the 30 that matter. Take one shot a day, and only one, for a month. Do it from the same position every day no matter the conditions. increase range by 100 every day to your max range then start over. Next month use a different position, and the next month another. At the end of a year you will know what that rifle can do, and you'll know what you can do with that rifle. [/QUOTE]
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