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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
140 A-MAX fails in flight to target @ 2950 fps
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<blockquote data-quote="Michael Courtney" data-source="post: 982502" data-attributes="member: 28191"><p>Could be. But most people forget that air drag and resulting heating of the tip is proportional to the air density. Elevations with elk and antelope have much lower air density than south Louisiana which is very close to sea level. The aerodynamic forces on the bullet at 2950 at sea level can be greater than at 3230 at 5000 ft. Twist rate and tip off angle come into play also, since failure occurs before much damping of the pitch and yaw.</p><p></p><p>This same lot of bullets never created a problem for us on the great plains or mountains at temps in the 80s, but started to cause trouble in Louisiana at temps in the 90s. </p><p></p><p>There's no doubt that these bullets work fine in a lot of different barrels, or Hornady would be so flooded with complaints they would have fixed the problem. Figuring out why these bullets fail in conditions where failure is common is the more challenging task.</p></blockquote><p></p>
[QUOTE="Michael Courtney, post: 982502, member: 28191"] Could be. But most people forget that air drag and resulting heating of the tip is proportional to the air density. Elevations with elk and antelope have much lower air density than south Louisiana which is very close to sea level. The aerodynamic forces on the bullet at 2950 at sea level can be greater than at 3230 at 5000 ft. Twist rate and tip off angle come into play also, since failure occurs before much damping of the pitch and yaw. This same lot of bullets never created a problem for us on the great plains or mountains at temps in the 80s, but started to cause trouble in Louisiana at temps in the 90s. There's no doubt that these bullets work fine in a lot of different barrels, or Hornady would be so flooded with complaints they would have fixed the problem. Figuring out why these bullets fail in conditions where failure is common is the more challenging task. [/QUOTE]
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140 A-MAX fails in flight to target @ 2950 fps
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