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
Advanced mathmatics....
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="Coyoter" data-source="post: 21180" data-attributes="member: 236"><p>Hello again!</p><p> OK, you're going to love this one. Somehow, it has to be possible to describe the overbore charactoristics of a cartridge and the inches of barrel required to burn the volume of powder it contains. For instance, I read an article some time ago where the author took an 8 x 57 with a 29" barrel, fired it over a chono, recorded the velocity, cut an inch off the barrel and repeated the process again. In the end, the 8 x 57 gained velocity with every shortening untill it got to about 22" or so and then it started to loose velocity. As I recall, it was around 18" when it had slowed to the same velocity that it started out with. </p><p> Somehow, there is a formula that states " when X volume of powder is burned in Y diameter bore with Z weight projectile in front of it then W length barrel is required to burn all of X powder without slowing the bullet due to excessive barrel length". This formula could also give an approximation of velocity decrease per inch of barrel removed.</p><p> Feel free to tell your friends at the local university about this one... I'm sure that for the right person, it's not that tough.</p><p> Thanks, Coyoter</p></blockquote><p></p>
[QUOTE="Coyoter, post: 21180, member: 236"] Hello again! OK, you're going to love this one. Somehow, it has to be possible to describe the overbore charactoristics of a cartridge and the inches of barrel required to burn the volume of powder it contains. For instance, I read an article some time ago where the author took an 8 x 57 with a 29" barrel, fired it over a chono, recorded the velocity, cut an inch off the barrel and repeated the process again. In the end, the 8 x 57 gained velocity with every shortening untill it got to about 22" or so and then it started to loose velocity. As I recall, it was around 18" when it had slowed to the same velocity that it started out with. Somehow, there is a formula that states " when X volume of powder is burned in Y diameter bore with Z weight projectile in front of it then W length barrel is required to burn all of X powder without slowing the bullet due to excessive barrel length". This formula could also give an approximation of velocity decrease per inch of barrel removed. Feel free to tell your friends at the local university about this one... I'm sure that for the right person, it's not that tough. Thanks, Coyoter [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Advanced mathmatics....
Top