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Rifles, Reloading, Optics, Equipment
Reloading
Favorite Powder for a 20 inch barrel 7mm-08?
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<blockquote data-quote="codyadams" data-source="post: 2698234" data-attributes="member: 87243"><p>The same powders that give best velocity in long barrels, will still give the best velocity in short barrels, that doesn't change with barrel length. Also, especially in a case like a 7mm-08, even with the slower burning powders, all the powder is burned usually in 14-16". The longer barrels don't allow "more powder to burn", that isn't why velocity increases, the extra velocity comes from the existing pressure having more time (barrel length) to impart energy (thus equalling velocity) upon the bullet.</p><p></p><p>Where you can run into issues *sometimes* is with high muzzle pressures from the powders that give more velocity. The muzzle pressure decreases as the barrel gets longer, so a shorter barrel with high intensity powders can have a high muzzle pressure, which *could* upset bullet flight, leading to erratic e.s. and/or poor accuracy.</p><p></p><p>Bottom line, if your using a powder that gave best velocity in your longer barrel, and accuracy/e.s. is acceptable to you, then there isn't a good reason to change.</p><p></p><p>That being said, I like Varget in a 7mm-08.</p></blockquote><p></p>
[QUOTE="codyadams, post: 2698234, member: 87243"] The same powders that give best velocity in long barrels, will still give the best velocity in short barrels, that doesn't change with barrel length. Also, especially in a case like a 7mm-08, even with the slower burning powders, all the powder is burned usually in 14-16". The longer barrels don't allow "more powder to burn", that isn't why velocity increases, the extra velocity comes from the existing pressure having more time (barrel length) to impart energy (thus equalling velocity) upon the bullet. Where you can run into issues *sometimes* is with high muzzle pressures from the powders that give more velocity. The muzzle pressure decreases as the barrel gets longer, so a shorter barrel with high intensity powders can have a high muzzle pressure, which *could* upset bullet flight, leading to erratic e.s. and/or poor accuracy. Bottom line, if your using a powder that gave best velocity in your longer barrel, and accuracy/e.s. is acceptable to you, then there isn't a good reason to change. That being said, I like Varget in a 7mm-08. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Favorite Powder for a 20 inch barrel 7mm-08?
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