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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Unburned Powder in Big Cases, Right?
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<blockquote data-quote="steve smith" data-source="post: 276679" data-attributes="member: 110"><p>I've found that one very important facor in finding unburned powder is whether or not the load was producing high enough pressure. Large charges of very slow powder in a fairly small case will produce these results. My 45LC with H110, even at max loadings, consistantly leave powder in the barrel, while top loadings in my 460 S&W rarely leave any. Only difference here is chamber pressure</p><p></p><p> As for finding it in a very overbore cartridge, well that entirely depends on how high or low the charge weight is, the burnrate of the powder, the weight of the projectile, as well as the barrel length.</p><p> </p><p>A large amount of slow powder pushing a light for caliber bullet out of a short barrel will almost definitely leave unburned powder.</p><p></p><p>Using the slowest burning powders I could get my hands on (namely WC 872, IMR 5010, H-50BMG,) and loading to top velocities in my 30" barreled 270-300Rum rarely left any unburned powder in the barrel. Come to think of it, I never really noticed any unburned powder at any charge weight, with most exceeding 100grs. I'll attribute that to the barrel length.</p></blockquote><p></p>
[QUOTE="steve smith, post: 276679, member: 110"] I've found that one very important facor in finding unburned powder is whether or not the load was producing high enough pressure. Large charges of very slow powder in a fairly small case will produce these results. My 45LC with H110, even at max loadings, consistantly leave powder in the barrel, while top loadings in my 460 S&W rarely leave any. Only difference here is chamber pressure As for finding it in a very overbore cartridge, well that entirely depends on how high or low the charge weight is, the burnrate of the powder, the weight of the projectile, as well as the barrel length. A large amount of slow powder pushing a light for caliber bullet out of a short barrel will almost definitely leave unburned powder. Using the slowest burning powders I could get my hands on (namely WC 872, IMR 5010, H-50BMG,) and loading to top velocities in my 30" barreled 270-300Rum rarely left any unburned powder in the barrel. Come to think of it, I never really noticed any unburned powder at any charge weight, with most exceeding 100grs. I'll attribute that to the barrel length. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Unburned Powder in Big Cases, Right?
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