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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: 2947995" data-attributes="member: 116289"><p>Charge weight, seating depth, and barrel tuning by ladder test with 3-5 shot groups cannot do anything but fool you with randomness. If you do a 5 shot ladder test and think you found a node. Repeat the test again. And you have a good chance of the node moving. Repeat the test 10 times and you have a 99% chance the node will move. This is a frustrating fact. But those three things do not change group size. The barrel of a gun moves before the bullet leaves. So weight of gun is the biggest factor in precision. Next are the components you use and how consistent they are. If your components were theoretically 100% consistent then given any Charge weight, seating depth, and barrel tuning for that given component set you would have the same precision as any other combination of the same components. Think about it. Why would there be a precision node for say powder charge? Or even a velocity node? It is counter intuitive and if you asked anyone who had never been infected with the idea what happens when you add powder they would tell you the right answer; the bullet goes faster. That's the only thing that changes and a ladder test of 3-5 will never statistically tell you otherwise.</p></blockquote><p></p>
[QUOTE="DallasLR, post: 2947995, member: 116289"] Charge weight, seating depth, and barrel tuning by ladder test with 3-5 shot groups cannot do anything but fool you with randomness. If you do a 5 shot ladder test and think you found a node. Repeat the test again. And you have a good chance of the node moving. Repeat the test 10 times and you have a 99% chance the node will move. This is a frustrating fact. But those three things do not change group size. The barrel of a gun moves before the bullet leaves. So weight of gun is the biggest factor in precision. Next are the components you use and how consistent they are. If your components were theoretically 100% consistent then given any Charge weight, seating depth, and barrel tuning for that given component set you would have the same precision as any other combination of the same components. Think about it. Why would there be a precision node for say powder charge? Or even a velocity node? It is counter intuitive and if you asked anyone who had never been infected with the idea what happens when you add powder they would tell you the right answer; the bullet goes faster. That’s the only thing that changes and a ladder test of 3-5 will never statistically tell you otherwise. [/QUOTE]
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6.5 PRC Powder Charge/Velocity Ladder Test. No Flat Spot
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