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
Rifles, Reloading, Optics, Equipment
Reloading
Ballistic Coefficient (BC)
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="rotorhead" data-source="post: 125853" data-attributes="member: 5078"><p>I'll do my best here. The lead placement is focused around balance and terminial ballistics. For example take a partition. The partition is placed where the bullet will balance with the lead on each side. The BC benifet is minute however the balance will help the overall aerodynamics which is to say, if a bullet is balanced it will overcome forces better or rather maintain itself. The rifling stabilizes the bullet by spinning the bullet if the bullet is balanced the bullet maintains better. A good example of what I am trying to say(rather poorley) is shooting a 80 grain .224 bullet out of a 1:14 twist barrel, the result is unbalanced due to a to slow of rate of twist, the bullet doesn't spin properley "as it was designed" therefore doesn't ballance.</p><p> I'm sorry that is the best I can explain the lead/placement thing.</p><p></p><p>As for the hollow points and plastic tips here is my shot at it. BC, simply put is how well does the bullet shead drag as you earilier stated. The plastic tip and the soft point closes any void and allows a point on the bullet to more effeciantly "cut the air" so to speak this reduces drag. So why is the hollow point so darn accurate with that drag producing hole in the front? How this works has alot to do with relative wind speed, supersonic aerodynamics and this is a subject that could keep me writing all day , so I will spell it out as simply as I can. The HP creates its own "airpoint" the air entering the hollow point becomes stagnet,and builds pressure, the pressure extend forward compressing the air ahead of the bullets path. The lower pressure around the bullet flows around the bullet as if it had a sharp point on it. This "airpoint does two main things It creates a sharper point but more importantly stabilizes the nose of the bullet. You may have seen that some people uniform the meplat on hollow points , If the meplat is not uniform the bullet will not create a centered "airpoint" so to speak. I know this is not explained real good but it is the best I can do with a computer right know. Hopefully this helps a little if it doesn't reply on what your questions are and I will try again.</p><p></p><p></p><p>RH /ubbthreads/images/graemlins/confused.gif</p><p>If you haven't read in the hunting section there is a quiet instrusting issue that comes up in the post titled sheep hunting rifle. I have written a little in that post about BC</p></blockquote><p></p>
[QUOTE="rotorhead, post: 125853, member: 5078"] I'll do my best here. The lead placement is focused around balance and terminial ballistics. For example take a partition. The partition is placed where the bullet will balance with the lead on each side. The BC benifet is minute however the balance will help the overall aerodynamics which is to say, if a bullet is balanced it will overcome forces better or rather maintain itself. The rifling stabilizes the bullet by spinning the bullet if the bullet is balanced the bullet maintains better. A good example of what I am trying to say(rather poorley) is shooting a 80 grain .224 bullet out of a 1:14 twist barrel, the result is unbalanced due to a to slow of rate of twist, the bullet doesn't spin properley "as it was designed" therefore doesn't ballance. I'm sorry that is the best I can explain the lead/placement thing. As for the hollow points and plastic tips here is my shot at it. BC, simply put is how well does the bullet shead drag as you earilier stated. The plastic tip and the soft point closes any void and allows a point on the bullet to more effeciantly "cut the air" so to speak this reduces drag. So why is the hollow point so darn accurate with that drag producing hole in the front? How this works has alot to do with relative wind speed, supersonic aerodynamics and this is a subject that could keep me writing all day , so I will spell it out as simply as I can. The HP creates its own "airpoint" the air entering the hollow point becomes stagnet,and builds pressure, the pressure extend forward compressing the air ahead of the bullets path. The lower pressure around the bullet flows around the bullet as if it had a sharp point on it. This "airpoint does two main things It creates a sharper point but more importantly stabilizes the nose of the bullet. You may have seen that some people uniform the meplat on hollow points , If the meplat is not uniform the bullet will not create a centered "airpoint" so to speak. I know this is not explained real good but it is the best I can do with a computer right know. Hopefully this helps a little if it doesn't reply on what your questions are and I will try again. RH [img]/ubbthreads/images/graemlins/confused.gif[/img] If you haven't read in the hunting section there is a quiet instrusting issue that comes up in the post titled sheep hunting rifle. I have written a little in that post about BC [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Ballistic Coefficient (BC)
Top