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Long Range Hunting & Shooting
6.5 PRC Powder Charge/Velocity Ladder Test. No Flat Spot
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<blockquote data-quote="DallasLR" data-source="post: 2949985" data-attributes="member: 116289"><p>Gentlemen, </p><p></p><p>It hurts. Most of us have spent unthinkable time doing tests that simply are not statistically significant. If you want the data you can read all of Bryan Litz's books. I would start with his series called <em>Modern Advancements in Long Range Shooting. </em></p><p></p><p>There is also a guy on YouTube who has built computing tools to statistically validate the same findings. His website is <a href="https://blackburndefense.com/" target="_blank">https://blackburndefense.com/</a></p><p></p><p>No matter what you think you have seen or what others think they have seen you have to shoot close to 50 rounds for an outcome to become statistically relevant. You just can't do ladder tests with that many rounds. And those that have, like myself, paid the price in components and barrels to try and save you from doing the same. Seating depth, powder charge, barrel harmonics, and even primer seating depth do not create more precision for any CONSISTENT combination. Ever single combination will have a different impact point but no single combination over another will be more precise (Eg hit that impact point more consistently). Moral of this story for those willing to listen: Pick a combination and spend your time and money replicating that exact combination for every single round. Shoot 15-20 rounds of it. Sight your scope and you will have a gun that is as accurate and as precise as that gun and those components can be. If that is not accurate enough for you do the same with "better" components. If that doesn't get you the precision you need buy a heavier gun. </p><p></p><p>Finally, if you see flyers it is most likely you. The barrel moves before the bullet leaves the barrel. It is unimaginably hard to consistently control this and is logarithmic to gun weight. Even a rail gun bolted to concrete will have changes if even a single mechanism, bolt, or comment deviates.</p></blockquote><p></p>
[QUOTE="DallasLR, post: 2949985, member: 116289"] Gentlemen, It hurts. Most of us have spent unthinkable time doing tests that simply are not statistically significant. If you want the data you can read all of Bryan Litz‘s books. I would start with his series called [I]Modern Advancements in Long Range Shooting. [/I] There is also a guy on YouTube who has built computing tools to statistically validate the same findings. His website is [URL]https://blackburndefense.com/[/URL] No matter what you think you have seen or what others think they have seen you have to shoot close to 50 rounds for an outcome to become statistically relevant. You just can’t do ladder tests with that many rounds. And those that have, like myself, paid the price in components and barrels to try and save you from doing the same. Seating depth, powder charge, barrel harmonics, and even primer seating depth do not create more precision for any CONSISTENT combination. Ever single combination will have a different impact point but no single combination over another will be more precise (Eg hit that impact point more consistently). Moral of this story for those willing to listen: Pick a combination and spend your time and money replicating that exact combination for every single round. Shoot 15-20 rounds of it. Sight your scope and you will have a gun that is as accurate and as precise as that gun and those components can be. If that is not accurate enough for you do the same with “better” components. If that doesn’t get you the precision you need buy a heavier gun. Finally, if you see flyers it is most likely you. The barrel moves before the bullet leaves the barrel. It is unimaginably hard to consistently control this and is logarithmic to gun weight. Even a rail gun bolted to concrete will have changes if even a single mechanism, bolt, or comment deviates. [/QUOTE]
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6.5 PRC Powder Charge/Velocity Ladder Test. No Flat Spot
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