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Rifles, Reloading, Optics, Equipment
Reloading
reloading mistake
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<blockquote data-quote="matemike" data-source="post: 1014658" data-attributes="member: 78984"><p>Mid to upper 30's on the grain scale is not a whole lot of powder. It's nothing near the big magnums or even the every-day magnums like the 7mm rem. So with it being less powder in the 22-250, jumps by a whole grain is a much larger change than say in a 338/378 Wby. </p><p> </p><p>A 1.0 grain jump from 36 to 37 grains is about a 2.7% increase in charge. Doesn't sound like much. But a 1.0 grain jump from 105 to 106 in a 338-378 Wby is about 0.94% increase in charge. (almost 2/3 less change) </p><p> </p><p>You might have wanted to make sure that 36 grains was okay. And when 37 was okay but minor signs of over-pressure, you should have gone up in 0.2 or 0.1 gr increments from that point. It's been stated many times on here, reloading books are for general ballpark min and max loads for common rifles. Every rifle is different. So going to max book load will always have it's risks. </p><p> </p><p>Work up in slower increments. Especially with the smaller powder weight cartridges.</p></blockquote><p></p>
[QUOTE="matemike, post: 1014658, member: 78984"] Mid to upper 30's on the grain scale is not a whole lot of powder. It's nothing near the big magnums or even the every-day magnums like the 7mm rem. So with it being less powder in the 22-250, jumps by a whole grain is a much larger change than say in a 338/378 Wby. A 1.0 grain jump from 36 to 37 grains is about a 2.7% increase in charge. Doesn't sound like much. But a 1.0 grain jump from 105 to 106 in a 338-378 Wby is about 0.94% increase in charge. (almost 2/3 less change) You might have wanted to make sure that 36 grains was okay. And when 37 was okay but minor signs of over-pressure, you should have gone up in 0.2 or 0.1 gr increments from that point. It's been stated many times on here, reloading books are for general ballpark min and max loads for common rifles. Every rifle is different. So going to max book load will always have it's risks. Work up in slower increments. Especially with the smaller powder weight cartridges. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
reloading mistake
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