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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet RPM and performance
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<blockquote data-quote="RockyMtnMT" data-source="post: 2524545" data-attributes="member: 7999"><p>I think many of the stories of bullets failing to open and deform for proper terminal performance are not bullet failures, but a failure to have enough stability to keep the bullet point on long enough to get fluid into the hollow point to cause the bullet to open from the inside out. If a bullet impacts with a yaw then it is much more likely that it will not get fluid into the hollow point for proper deformation. Tipped, exposed lead, or open hollow point, are all hollow points. The tip is a plug in the hole that must evacuate to allow fluid in to cause opening from the inside out. Exposed lead tip basically has fluid already in the hole. Just needs point on pressure to cause the lead to become liquid and cause the inside out opening. This is likely the easiest to deform depending on lead hardness and jacket. Then the exposed open hollow point. Size of hollow point and material hardness will dictate consistency of opening. The smaller the hollow point the more critical the angle of impact to get fluid into the hollow point. 1mm hollow point we found too inconsistent to market as a hunting bullet.</p><p></p><p>For us the chase for higher bc is hard to resist. We are long range hunters. We continue to test but will not sacrifice terminal performance for anything. We will be doing some more tip testing soon. To date we have yet to find a tip that will perform as well at low velocity as the open hollow point. Why have a higher bc bullet that will not perform at as low of impact velocity? You are better off running the consistent performing open hollow point with lower bc that will perform at lower velocity. High bc bullet that needs more velocity to open reducing it's range is counter productive. Let alone the risk of the tip not evacuating the hollow point at higher velocity increasing the chance of failure compared to an open hollow point. Keeping the chance of failure as low as possible is most important.</p><p></p><p>I hope that someday I will have to eat crow when it comes to tipped bullets. I am not holding my breathe.</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 2524545, member: 7999"] I think many of the stories of bullets failing to open and deform for proper terminal performance are not bullet failures, but a failure to have enough stability to keep the bullet point on long enough to get fluid into the hollow point to cause the bullet to open from the inside out. If a bullet impacts with a yaw then it is much more likely that it will not get fluid into the hollow point for proper deformation. Tipped, exposed lead, or open hollow point, are all hollow points. The tip is a plug in the hole that must evacuate to allow fluid in to cause opening from the inside out. Exposed lead tip basically has fluid already in the hole. Just needs point on pressure to cause the lead to become liquid and cause the inside out opening. This is likely the easiest to deform depending on lead hardness and jacket. Then the exposed open hollow point. Size of hollow point and material hardness will dictate consistency of opening. The smaller the hollow point the more critical the angle of impact to get fluid into the hollow point. 1mm hollow point we found too inconsistent to market as a hunting bullet. For us the chase for higher bc is hard to resist. We are long range hunters. We continue to test but will not sacrifice terminal performance for anything. We will be doing some more tip testing soon. To date we have yet to find a tip that will perform as well at low velocity as the open hollow point. Why have a higher bc bullet that will not perform at as low of impact velocity? You are better off running the consistent performing open hollow point with lower bc that will perform at lower velocity. High bc bullet that needs more velocity to open reducing it's range is counter productive. Let alone the risk of the tip not evacuating the hollow point at higher velocity increasing the chance of failure compared to an open hollow point. Keeping the chance of failure as low as possible is most important. I hope that someday I will have to eat crow when it comes to tipped bullets. I am not holding my breathe. [/QUOTE]
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Bullet RPM and performance
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