Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Hunting
Long Range Hunting & Shooting
Tumbled bullets = poor accuracy?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Kevin Thomas" data-source="post: 509899" data-attributes="member: 15748"><p>It would seem that way, and it's a logical assumption. But that's not the case. Shooters tend to be very focused on the nose of bullets, the meplats and forward surfaces of the ogives directly behind there, but it's in truth probably the most insensitve portion of the bullet where flight dynamics are concerned. Just to be clear, however, I should specify that I'm talking about short range accuracy here. There can and will be changes in BC when the noses aren't uniform, and that will in turn affect vertical dispersion at greater distances. Varying BC's also make windage holds/adjustment more of a wild-assed guess than an exercise in true doping wind. So from that standpoint, yeah, I guess you could say accuracy is impacted.</p><p> </p><p>As far as the pieces of media protruding and becoming dislodged during flight, no, I can't go along with that one. To begin with, they'd never withstand either the forces of the launch, or the heat generated during flight. As to the changing of shape during that flight, again, it's not going to be a factor in any meaningful sense. Lead tips on spitzers, for example, alter their shape during flight as surface areas reach melting point and begin to be peeled away by atmospheric resistance. So long as they do so on a fairly consistent basis from shot to shot, they're still capable of shooting decent groups even at longer ranges. On a larger scale, some types of ICBM re-entry vehiciles actually use this process (it's known as ablation) as a cooling method to shed excess heat. So, some degree of shape change, so long as it remains consistant from shot to shot, just won't make that much difference.</p><p> </p><p>The other point that needs to be considered is where theis media would be located as you view the bullet head on. I tried to make that clear in my initial post, but perhaps I wasn't able to get my point across. Anyway, here goes again. When you look at the bullet from the nose on, the defects at the nose (be they media in the hollowpoint or some other deformity), are actually located very close to the center of mass of the bullet as it's in flight. Think of it this way; we tie a weight to a very short string of just an inch or so and swing it in a circle. Then we tie the same weight to another string three feet long and swing that in a circle as well. The centrifugal forces acting on the longer arc are much more apparent. It's the same when the variance (whatever imbalance we're talking about here) is located very close to the centerline of the axis of a bullet, as compared to when it's located out towards the jacket. . An air void located precisely in the center of that axis would have no effect on the balance of that bullet, whereas if it's loacated out against the jacket wall, you have a major problem. I hope that's a bit clearer.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 509899, member: 15748"] It would seem that way, and it's a logical assumption. But that's not the case. Shooters tend to be very focused on the nose of bullets, the meplats and forward surfaces of the ogives directly behind there, but it's in truth probably the most insensitve portion of the bullet where flight dynamics are concerned. Just to be clear, however, I should specify that I'm talking about short range accuracy here. There can and will be changes in BC when the noses aren't uniform, and that will in turn affect vertical dispersion at greater distances. Varying BC's also make windage holds/adjustment more of a wild-assed guess than an exercise in true doping wind. So from that standpoint, yeah, I guess you could say accuracy is impacted. As far as the pieces of media protruding and becoming dislodged during flight, no, I can't go along with that one. To begin with, they'd never withstand either the forces of the launch, or the heat generated during flight. As to the changing of shape during that flight, again, it's not going to be a factor in any meaningful sense. Lead tips on spitzers, for example, alter their shape during flight as surface areas reach melting point and begin to be peeled away by atmospheric resistance. So long as they do so on a fairly consistent basis from shot to shot, they're still capable of shooting decent groups even at longer ranges. On a larger scale, some types of ICBM re-entry vehiciles actually use this process (it's known as ablation) as a cooling method to shed excess heat. So, some degree of shape change, so long as it remains consistant from shot to shot, just won't make that much difference. The other point that needs to be considered is where theis media would be located as you view the bullet head on. I tried to make that clear in my initial post, but perhaps I wasn't able to get my point across. Anyway, here goes again. When you look at the bullet from the nose on, the defects at the nose (be they media in the hollowpoint or some other deformity), are actually located very close to the center of mass of the bullet as it's in flight. Think of it this way; we tie a weight to a very short string of just an inch or so and swing it in a circle. Then we tie the same weight to another string three feet long and swing that in a circle as well. The centrifugal forces acting on the longer arc are much more apparent. It's the same when the variance (whatever imbalance we're talking about here) is located very close to the centerline of the axis of a bullet, as compared to when it's located out towards the jacket. . An air void located precisely in the center of that axis would have no effect on the balance of that bullet, whereas if it's loacated out against the jacket wall, you have a major problem. I hope that's a bit clearer. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
Tumbled bullets = poor accuracy?
Top