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Rifles, Reloading, Optics, Equipment
Reloading
Accurate Burn Rate chart that compares Hodgden-Alliant-Viht powders
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<blockquote data-quote="MagnumManiac" data-source="post: 2428581" data-attributes="member: 10755"><p>Burn rate charts are a waste of time because there is NO STANDARD to which a powder company has to derive their RQ numbers.</p><p>I have said this here so many times it should become a sticky.</p><p>BURN RATE IS NOT CONSTANT.</p><p>Also, if IMR used 4895 as their regulation powder with which all other powders are compared to and, Hodgdon use 4895 as their powder they regulate off, who knows exactly the burn rate other than those 2 company's? The numbers mean absolutely nothing.</p><p>RQ numbers (Relative Quickness) is either a higher number than 100, for a slower powder, or a lower number for a faster powder……guess what? Even in their testing, two powders that are close often switch positions and they are not going to rush out and change the position because they know that on the next test it will most likely switch positions again.</p><p>BURN RATE IS NOT CONSTANT.</p><p>Burn rate charts are a guess at best as to which powders group together, because only THAT powder company compares THEIR powder to each other, no one else's powder.</p><p>Burn rate charts are a very rough guide and often are WRONG.</p><p>The easiest way to determine a suitable powder if you need to switch, is look at lots of data, if another powder has similar load numbers and velocity numbers, then it is probably close to each other.</p><p>RE25 and Retumbo make a good powder switch, load density is about the same and velocities often match. Same goes for H4350 and 760.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2428581, member: 10755"] Burn rate charts are a waste of time because there is NO STANDARD to which a powder company has to derive their RQ numbers. I have said this here so many times it should become a sticky. BURN RATE IS NOT CONSTANT. Also, if IMR used 4895 as their regulation powder with which all other powders are compared to and, Hodgdon use 4895 as their powder they regulate off, who knows exactly the burn rate other than those 2 company’s? The numbers mean absolutely nothing. RQ numbers (Relative Quickness) is either a higher number than 100, for a slower powder, or a lower number for a faster powder……guess what? Even in their testing, two powders that are close often switch positions and they are not going to rush out and change the position because they know that on the next test it will most likely switch positions again. BURN RATE IS NOT CONSTANT. Burn rate charts are a guess at best as to which powders group together, because only THAT powder company compares THEIR powder to each other, no one else’s powder. Burn rate charts are a very rough guide and often are WRONG. The easiest way to determine a suitable powder if you need to switch, is look at lots of data, if another powder has similar load numbers and velocity numbers, then it is probably close to each other. RE25 and Retumbo make a good powder switch, load density is about the same and velocities often match. Same goes for H4350 and 760. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accurate Burn Rate chart that compares Hodgden-Alliant-Viht powders
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