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Hunting
Long Range Hunting & Shooting
I am very dissapointed with Berger bullets regarding the 338 hybrid bullet.
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<blockquote data-quote="GMBshootingclubM60" data-source="post: 403157" data-attributes="member: 25313"><p>Check my math...</p><p></p><p>(f) in pounds / (m) mass in pounds = (a) in Gs, or 32 ft/sec/sec.</p><p></p><p></p><p>(f) = area x pressure </p><p>that is, area = pi x r x r x pressure</p><p>(f) = .169 x .169 x 3.14 x 65000</p><p>(f) = 5829 pounds on the base of a .338 bullet directed down the bore</p><p></p><p>(m) = 300 grains / 7000 grains / pound</p><p>(m) = .0429 pounds of mass</p><p></p><p>So...</p><p></p><p>5829 / 0.0429 = about 135880Gs.</p><p></p><p></p><p>This only works before the bullet starts to move fast and the gas laws come into play. The 5829 pounds will have the force required to engrave the bullet subtracted as the bullet enters the lands. Later, the force to push the bullet down the bore will need to be subtracted...but by then the peak pressure will be long gone.</p></blockquote><p></p>
[QUOTE="GMBshootingclubM60, post: 403157, member: 25313"] Check my math... (f) in pounds / (m) mass in pounds = (a) in Gs, or 32 ft/sec/sec. (f) = area x pressure that is, area = pi x r x r x pressure (f) = .169 x .169 x 3.14 x 65000 (f) = 5829 pounds on the base of a .338 bullet directed down the bore (m) = 300 grains / 7000 grains / pound (m) = .0429 pounds of mass So... 5829 / 0.0429 = about 135880Gs. This only works before the bullet starts to move fast and the gas laws come into play. The 5829 pounds will have the force required to engrave the bullet subtracted as the bullet enters the lands. Later, the force to push the bullet down the bore will need to be subtracted...but by then the peak pressure will be long gone. [/QUOTE]
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Hunting
Long Range Hunting & Shooting
I am very dissapointed with Berger bullets regarding the 338 hybrid bullet.
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