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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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<blockquote data-quote="Chawlston" data-source="post: 138857"><p>I think it would be an interesting study to see the different amount of deformation you get on a bullets base with different pressure levels.</p><p></p><p>Since no two primers are "exactly" the same and once the barrel is fouled, pressures are not exactly the same on each shot. Each powder charge is going to be different due to some powder granules having different geometry. Brass cases will have different neck tensions. The barrel will wear with each shot. As temperature climbs, pressure will change etc, ect.</p><p></p><p>So, you could achieve the exact same muzzle velocity with different pressure levels and different amounts of bullet deformation on the base.</p><p></p><p>Different amounts of bullet deformation = a different BC. I don't see why this is so hard to visualize. Next issue.</p><p></p><p>James</p></blockquote><p></p>
[QUOTE="Chawlston, post: 138857"] I think it would be an interesting study to see the different amount of deformation you get on a bullets base with different pressure levels. Since no two primers are "exactly" the same and once the barrel is fouled, pressures are not exactly the same on each shot. Each powder charge is going to be different due to some powder granules having different geometry. Brass cases will have different neck tensions. The barrel will wear with each shot. As temperature climbs, pressure will change etc, ect. So, you could achieve the exact same muzzle velocity with different pressure levels and different amounts of bullet deformation on the base. Different amounts of bullet deformation = a different BC. I don't see why this is so hard to visualize. Next issue. James [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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