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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Nosler Accubond Long Range problem
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<blockquote data-quote="MontanaRifleman" data-source="post: 846659" data-attributes="member: 11717"><p>I agree that mono's have different expansion characteristics than cup and core, but not different terminal stability rules. I used to be of the mind set that good stability was required for reliable expansion, but recently, as the result of a discussion in another thread, I've found out that it seems to be the opposite. Good expansion is required for "terminal stability". In short, if bullets don't expand, they tumble. If they do expand, they go straight. That is the rule for the pointy bullets. Here's a video by Gunwerks that illustrates that.</p><p></p><p><a href="http://www.youtube.com/watch?feature=player_detailpage&v=Aitpd7I7UrQ" target="_blank">Bullet Penetration & Shoulder Stabilization - YouTube</a></p><p></p><p>The video says that no amount of spin is able to keep a bullet stable once it is penetrating a denser media.</p><p></p><p>For blunt nose bullets, basically cylinder shaped, like the GSC FN's, their blunt nose shape results in the same stabilizing effect as an expanded spritzer.</p><p></p><p>If the expanded bullet has an irregular shaped front, then I'm sure it would affect straight line penetration to a degree. The longest penetration shot I ever made was a Texas heart shot on a speed goat buck at about 200 yds. The bullet (.308 180 gr Fed Soft Point) entered precisely between the hams and the remnant slug ended up under the hide of the front shoulder, The path was very straight, The frontal was a bit irregular, but the slug itself (about 40% of original weight) was only about as long as it was wide and probably acted a lot like a round ball. I still have it.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 846659, member: 11717"] I agree that mono's have different expansion characteristics than cup and core, but not different terminal stability rules. I used to be of the mind set that good stability was required for reliable expansion, but recently, as the result of a discussion in another thread, I've found out that it seems to be the opposite. Good expansion is required for "terminal stability". In short, if bullets don't expand, they tumble. If they do expand, they go straight. That is the rule for the pointy bullets. Here's a video by Gunwerks that illustrates that. [url=http://www.youtube.com/watch?feature=player_detailpage&v=Aitpd7I7UrQ]Bullet Penetration & Shoulder Stabilization - YouTube[/url] The video says that no amount of spin is able to keep a bullet stable once it is penetrating a denser media. For blunt nose bullets, basically cylinder shaped, like the GSC FN's, their blunt nose shape results in the same stabilizing effect as an expanded spritzer. If the expanded bullet has an irregular shaped front, then I'm sure it would affect straight line penetration to a degree. The longest penetration shot I ever made was a Texas heart shot on a speed goat buck at about 200 yds. The bullet (.308 180 gr Fed Soft Point) entered precisely between the hams and the remnant slug ended up under the hide of the front shoulder, The path was very straight, The frontal was a bit irregular, but the slug itself (about 40% of original weight) was only about as long as it was wide and probably acted a lot like a round ball. I still have it. [/QUOTE]
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Nosler Accubond Long Range problem
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