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Long Range Hunting & Shooting
Extreme spread and standard deviation vs accuracy
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<blockquote data-quote="StumpyJohnson" data-source="post: 2922635" data-attributes="member: 122458"><p>I think it's important to know that 3 shot and 5 shot groups can give you just a small peak at total dispersion. </p><p></p><p>Small sample sizes.</p><p></p><p>There's a video by Hornady, called "Your groups are too small." It's a bit controversial, but I think there's some truth to it. </p><p></p><p>Also, I've had similar issues and I find that I usually avoid the hottest loads, for various reasons. At the end of the day never adjust more than one variable at a time and maybe try 10 shot groups.</p><p></p><p>My 6.5 prc will stack twenty shots into a 1.5" groups at 200yds. It will also shoot 1.5inch 5 shot groups at 100yds. And finally it will consistently shoot 3" groups out to 600yds. Reload for your purpose. </p><p></p><p>But my sd/es are always low and I think that plays a very important role in my longer range work. </p><p></p><p>Never used imr4831... But have had great results with h4831sc,n165,and n170. Also, went away from magnum primers due to availability, and I don't think I'll go back. My numbers are better without them.</p><p></p><p>Make small tweaks and shoot more. Or change a component.</p><p></p><p></p><p>Good luck. LMK if you want my pet loads.</p></blockquote><p></p>
[QUOTE="StumpyJohnson, post: 2922635, member: 122458"] I think it's important to know that 3 shot and 5 shot groups can give you just a small peak at total dispersion. Small sample sizes. There's a video by Hornady, called "Your groups are too small." It's a bit controversial, but I think there's some truth to it. Also, I've had similar issues and I find that I usually avoid the hottest loads, for various reasons. At the end of the day never adjust more than one variable at a time and maybe try 10 shot groups. My 6.5 prc will stack twenty shots into a 1.5" groups at 200yds. It will also shoot 1.5inch 5 shot groups at 100yds. And finally it will consistently shoot 3" groups out to 600yds. Reload for your purpose. But my sd/es are always low and I think that plays a very important role in my longer range work. Never used imr4831... But have had great results with h4831sc,n165,and n170. Also, went away from magnum primers due to availability, and I don't think I'll go back. My numbers are better without them. Make small tweaks and shoot more. Or change a component. Good luck. LMK if you want my pet loads. [/QUOTE]
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Extreme spread and standard deviation vs accuracy
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