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Rifles, Reloading, Optics, Equipment
Reloading
This is why we have "starting loads".
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<blockquote data-quote="MagnumManiac" data-source="post: 1121710" data-attributes="member: 10755"><p>This amazes me.</p><p>Unless you are using EXACTLY the same components, you can quite easily exceed the manuals velocity and still be in safe pressures. Why? Because your barrel is most likely looser in every tolerance compared to a pressure barrel, number of grooves, their width etc will not be the same as the barrel the testing was done in. I have a pressure trace, some rifles ARE faster than others due to groove number mostly, but also rifling type, width and looseness or tightness of those grooves and lands. Narrow grooves are generally faster than wide types.</p><p>If you work up until the rifle TELLS you the pressure has become excessive, such as slight sticky bolt lift, then back off 1-2%, you are safe, no matter what the chrony says. </p><p>Why do you think no 2 manuals mirror each other in the results with the same powder charges?</p><p></p><p>Cheers.</p><p>lightbulb</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1121710, member: 10755"] This amazes me. Unless you are using EXACTLY the same components, you can quite easily exceed the manuals velocity and still be in safe pressures. Why? Because your barrel is most likely looser in every tolerance compared to a pressure barrel, number of grooves, their width etc will not be the same as the barrel the testing was done in. I have a pressure trace, some rifles ARE faster than others due to groove number mostly, but also rifling type, width and looseness or tightness of those grooves and lands. Narrow grooves are generally faster than wide types. If you work up until the rifle TELLS you the pressure has become excessive, such as slight sticky bolt lift, then back off 1-2%, you are safe, no matter what the chrony says. Why do you think no 2 manuals mirror each other in the results with the same powder charges? Cheers. lightbulb [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
This is why we have "starting loads".
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