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Hunting
Long Range Hunting & Shooting
Effect of Bullet Spin on Terminal Performance
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<blockquote data-quote="Wedgy" data-source="post: 1695609" data-attributes="member: 64108"><p>Rotation stabilizes the bullet so it can keep going straight once it hits the target. The 195 Berger got a bad reputation at first because people were shooting it with a 9 twist and although it was stable enough to make round holes in paper it would fold over, bend like a banana, and not open up when hitting game. The most stable way that bullet flies is backwards, not very aerodynamic but very stable. It is trying to flip over in flight but the spin prevents it until it becomes unstable/under rotated and you see it hit the target sideways on paper. It is impossible to keep going straight, expand(hollow point filling up) and create a wound channel if it's on its side. Think of a top spinning on a surface, when it's spinning fast you can't knock it over but once it slows down it gets wobbly and falls. The .30 caliber 230+ grain bullets can have this problem also when shot from a 10 twist. I have to shoot lead free in CA which requires a faster twist for like weight projectiles and have been addressing this issue for a while. Hopefully Steve from Hammer will chime in as he has some very interesting observations on this subject.</p></blockquote><p></p>
[QUOTE="Wedgy, post: 1695609, member: 64108"] Rotation stabilizes the bullet so it can keep going straight once it hits the target. The 195 Berger got a bad reputation at first because people were shooting it with a 9 twist and although it was stable enough to make round holes in paper it would fold over, bend like a banana, and not open up when hitting game. The most stable way that bullet flies is backwards, not very aerodynamic but very stable. It is trying to flip over in flight but the spin prevents it until it becomes unstable/under rotated and you see it hit the target sideways on paper. It is impossible to keep going straight, expand(hollow point filling up) and create a wound channel if it's on its side. Think of a top spinning on a surface, when it's spinning fast you can't knock it over but once it slows down it gets wobbly and falls. The .30 caliber 230+ grain bullets can have this problem also when shot from a 10 twist. I have to shoot lead free in CA which requires a faster twist for like weight projectiles and have been addressing this issue for a while. Hopefully Steve from Hammer will chime in as he has some very interesting observations on this subject. [/QUOTE]
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Effect of Bullet Spin on Terminal Performance
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