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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="Hugnot" data-source="post: 2949032" data-attributes="member: 115658"><p>Pricy bullets, powder, brass, & scarce LR primers encourage smart load development.</p><p></p><p>I use the "Students T" method, being unknowledgeable about the Gaussian distribution like:</p><p></p><p>[ATTACH]511551[/ATTACH]</p><p></p><p>This workup gives some idea of what to expect when more ammo is made using a 95% confidence level.</p><p></p><p>I select components that provide minimum extreme spreads taking into consideration other factors such as case capacity, neck tension & bullet seating depth. A sample size of 8 or more might give some indication. Shoot another batch with same values. Don't let round cook in warm/hot chamber, after shot # 6, I paused for a cool down.</p><p></p><p>Then upon selection shoot a 5 shot group at 100, after 1 fouling round. If good, shoot some more 5 shot groups at 200 & 300.</p><p>I might get a Lab Radar. That bayonet thingy looks cool but affects groups.</p><p></p><p>Never worked with the Gaussian distribution stuff but sort of think it would be similar as "bell shaped" curve or normal distribution would also be applied. The Gaussian approach might require fewer pricy components to be used up, would tails on both ends be shorter?</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2949032, member: 115658"] Pricy bullets, powder, brass, & scarce LR primers encourage smart load development. I use the "Students T" method, being unknowledgeable about the Gaussian distribution like: [ATTACH alt="Screenshot (748).png"]511551[/ATTACH] This workup gives some idea of what to expect when more ammo is made using a 95% confidence level. I select components that provide minimum extreme spreads taking into consideration other factors such as case capacity, neck tension & bullet seating depth. A sample size of 8 or more might give some indication. Shoot another batch with same values. Don't let round cook in warm/hot chamber, after shot # 6, I paused for a cool down. Then upon selection shoot a 5 shot group at 100, after 1 fouling round. If good, shoot some more 5 shot groups at 200 & 300. I might get a Lab Radar. That bayonet thingy looks cool but affects groups. Never worked with the Gaussian distribution stuff but sort of think it would be similar as "bell shaped" curve or normal distribution would also be applied. The Gaussian approach might require fewer pricy components to be used up, would tails on both ends be shorter? [/QUOTE]
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6.5 PRC Powder Charge/Velocity Ladder Test. No Flat Spot
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