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Long Range Hunting & Shooting
Tumbled bullets = poor accuracy?
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<blockquote data-quote="Kevin Thomas" data-source="post: 509125" data-attributes="member: 15748"><p>No, the media in the nose won't cause an accuracy loss. To begin with, it has very little mass, and when it's in the nose it's located very close to the centerline (and along the axis of the CG) of the bullet. This minimizes any effect that it might exert if it were located further out, say closer to the jacket wall at the bearing surface. Saw this quite frequently before Sierra switched to a larger grade of nutshell that wouldn't pass through the hollowpoints of MK bullets. Prior to that, they had used a very fine grade of nutshell which would fill the nose. Never caused any accuracy problems, but there were lots of customer complaints about opening up a new box of bullets and finding nutshell in the bottom which had come out of the noses during shipment. So the polishing is strictly cosmetic, and done with the knowledge that it does degrade accuracy a bit. That frontal portion of the bullet is a surprisingly insensitvie area. Honestly, most shooters would be astonished to see just how badly you can bugger up the nose of a bullet without having any deleterious effect on accuracy, at least at shorter ranges (100, maybe even 200 yards or so). So no, in the pile of potential problems in bullet construction, a little media in the nose cavity doesn't amount to much of anything.</p><p> </p><p>The tumbling process itself is a different matter, and yes, it degrades accuracy. The most accurate that bullet will ever be, is when it's punched out the sizing die and into the collection box below. From that point on, any step that involves handling the bullet increases the likelyhood that it will be damaged and the accuracy degraded. Most shooters like the nice, shiney finish of a new box of bullets. Most competitive shooters, however, have been after them for many, many years now to package the bullets untumbled, right as they come off the machine. In tumbling them to remove the oil (originally, at the factory) and then again to apply the moly, and finally a third time to attempt to remove the moly, yeah, there's a lot of opportunities to degrade the accuracy of the bullet during all that rock 'n rolling. My guess would be, that's exactly what happened.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 509125, member: 15748"] No, the media in the nose won't cause an accuracy loss. To begin with, it has very little mass, and when it's in the nose it's located very close to the centerline (and along the axis of the CG) of the bullet. This minimizes any effect that it might exert if it were located further out, say closer to the jacket wall at the bearing surface. Saw this quite frequently before Sierra switched to a larger grade of nutshell that wouldn't pass through the hollowpoints of MK bullets. Prior to that, they had used a very fine grade of nutshell which would fill the nose. Never caused any accuracy problems, but there were lots of customer complaints about opening up a new box of bullets and finding nutshell in the bottom which had come out of the noses during shipment. So the polishing is strictly cosmetic, and done with the knowledge that it does degrade accuracy a bit. That frontal portion of the bullet is a surprisingly insensitvie area. Honestly, most shooters would be astonished to see just how badly you can bugger up the nose of a bullet without having any deleterious effect on accuracy, at least at shorter ranges (100, maybe even 200 yards or so). So no, in the pile of potential problems in bullet construction, a little media in the nose cavity doesn't amount to much of anything. The tumbling process itself is a different matter, and yes, it degrades accuracy. The most accurate that bullet will ever be, is when it's punched out the sizing die and into the collection box below. From that point on, any step that involves handling the bullet increases the likelyhood that it will be damaged and the accuracy degraded. Most shooters like the nice, shiney finish of a new box of bullets. Most competitive shooters, however, have been after them for many, many years now to package the bullets untumbled, right as they come off the machine. In tumbling them to remove the oil (originally, at the factory) and then again to apply the moly, and finally a third time to attempt to remove the moly, yeah, there's a lot of opportunities to degrade the accuracy of the bullet during all that rock 'n rolling. My guess would be, that's exactly what happened. [/QUOTE]
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Tumbled bullets = poor accuracy?
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