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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Testing Friction Reduction of Bullet Coatings
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<blockquote data-quote="Michael Courtney" data-source="post: 682943" data-attributes="member: 28191"><p>A significant reduction in pressure and less than a 1% reduction in velocity for a slightly heavier bullet, probably indicates a significant reduction in barrel friction. However, it is not evident that the Accuvel rather than the change from a solid copper X bullet to a jacketed lead Berger was the cause of reduced friction. Our testing has shown that solid copper TSX bullets tend to have roughly 50% more friction than jacketed lead bullets. And we believe that the older X bullets without the grooves would have even more friction.</p><p></p><p>Sound scientific testing requires only changing one factor at a time. Different pressure observations can be caused by different primers, different lots of brass, different temperature between the two tests, different lots of powders, etc. In our friction tests, we have been careful that the only thing we changed was the explicit factor under study. This has allowed us to accurately quantify the friction of different bullets.</p><p></p><p>Assessing the effectiveness of Accuvel is further hindered by the fact that no scientific data appears to be available, and the company appears to be out of business.</p></blockquote><p></p>
[QUOTE="Michael Courtney, post: 682943, member: 28191"] A significant reduction in pressure and less than a 1% reduction in velocity for a slightly heavier bullet, probably indicates a significant reduction in barrel friction. However, it is not evident that the Accuvel rather than the change from a solid copper X bullet to a jacketed lead Berger was the cause of reduced friction. Our testing has shown that solid copper TSX bullets tend to have roughly 50% more friction than jacketed lead bullets. And we believe that the older X bullets without the grooves would have even more friction. Sound scientific testing requires only changing one factor at a time. Different pressure observations can be caused by different primers, different lots of brass, different temperature between the two tests, different lots of powders, etc. In our friction tests, we have been careful that the only thing we changed was the explicit factor under study. This has allowed us to accurately quantify the friction of different bullets. Assessing the effectiveness of Accuvel is further hindered by the fact that no scientific data appears to be available, and the company appears to be out of business. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Testing Friction Reduction of Bullet Coatings
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