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
Rifles, Bullets, Barrels & Ballistics
ballistic coefficient on bullets
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="goodgrouper" data-source="post: 130785" data-attributes="member: 2852"><p>I don't want to flare up a fire here but the barrel <strong>does have an affect on bc.</strong> The twist rate is directly responsible in part for the stability of the bullet and how it flies through the air. Understabilized bullets with a rated bc of say .7 obviously do not fly as efficiently as a properly stabilized bullet with a bc of .7 resulting in a much lower bc. On the flip side, a bullet that is overstabilized also has an altered bc because of the agressive yaw of repose and the nose might not follow the arc of the trajectory although it will be quite a small difference. Much smaller reduction in bc than if the bullet is understabilized of course.</p><p></p><p>Badly worn barrels also change the bc of the bullet as they degrade the aerodynamics of the bullet jacket. Over the course of the barrels life, you can usually see a small degredation of bc over time.</p><p></p><p>Now, for purposes of actually trying to hit a target, the shooter must know how air density and air temp among other atmospherics change the path of his bullet. Or just get a ballistic program and carry it with you in the field and it will correct the the trajectory for you and give the proper information.</p><p></p><p>Clear as mud right?</p></blockquote><p></p>
[QUOTE="goodgrouper, post: 130785, member: 2852"] I don't want to flare up a fire here but the barrel [b]does have an affect on bc.[/b] The twist rate is directly responsible in part for the stability of the bullet and how it flies through the air. Understabilized bullets with a rated bc of say .7 obviously do not fly as efficiently as a properly stabilized bullet with a bc of .7 resulting in a much lower bc. On the flip side, a bullet that is overstabilized also has an altered bc because of the agressive yaw of repose and the nose might not follow the arc of the trajectory although it will be quite a small difference. Much smaller reduction in bc than if the bullet is understabilized of course. Badly worn barrels also change the bc of the bullet as they degrade the aerodynamics of the bullet jacket. Over the course of the barrels life, you can usually see a small degredation of bc over time. Now, for purposes of actually trying to hit a target, the shooter must know how air density and air temp among other atmospherics change the path of his bullet. Or just get a ballistic program and carry it with you in the field and it will correct the the trajectory for you and give the proper information. Clear as mud right? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
ballistic coefficient on bullets
Top