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Rifles, Reloading, Optics, Equipment
Reloading
Ball powder---myths or facts
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<blockquote data-quote="65WSM" data-source="post: 659771" data-attributes="member: 9551"><p>I recently aquired a used 6mm PPC. I have never loaded for this cartridge. 13.5 twist barrel limited to 70gr bullets according to the previous owner. I looked up what the competitors are using with similar rifles. I used quickload and found that the N-133 powder that competitors are using in 100 yd benchrest has the lowest flame temperature compared to IMR 8208, H-322, Benchrest and some others. I also found excellent standard deviation with N-133 compared to the others when testing over a chronograph I confirmed what the experts have learned. N-133 is likely to have the longest barrel life.</p><p></p><p>Why do we have stick powder? Why isn't all powder ball powder? The reason is because stick powder, particularly with dimpled ends can grow in surface area as it burns down the barrel, producing more gas as the volume available to the powder charge expands. Ball powder does the reverse, as the powder column expands the gases generated decreases because the burning surface area is reduced.</p></blockquote><p></p>
[QUOTE="65WSM, post: 659771, member: 9551"] I recently aquired a used 6mm PPC. I have never loaded for this cartridge. 13.5 twist barrel limited to 70gr bullets according to the previous owner. I looked up what the competitors are using with similar rifles. I used quickload and found that the N-133 powder that competitors are using in 100 yd benchrest has the lowest flame temperature compared to IMR 8208, H-322, Benchrest and some others. I also found excellent standard deviation with N-133 compared to the others when testing over a chronograph I confirmed what the experts have learned. N-133 is likely to have the longest barrel life. Why do we have stick powder? Why isn't all powder ball powder? The reason is because stick powder, particularly with dimpled ends can grow in surface area as it burns down the barrel, producing more gas as the volume available to the powder charge expands. Ball powder does the reverse, as the powder column expands the gases generated decreases because the burning surface area is reduced. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Ball powder---myths or facts
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