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
how fast is to fast-Berger VLDs
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="load" data-source="post: 636706" data-attributes="member: 22789"><p>I dont have all the answers to exterior ballistics but one of the reasons for a slower twist and increased accuracy could be</p><p>1- magnus effect. the faster a bullet leaves the barrel the higher the rpm it is spinning at. at 3200 fps and 1/9.5 a bullet is spinning at 242496 rpm, at 3200 fps and 1/11 is spinning at 209280. think of a top spinning it fights gravity and wants to "stand up" The more the bullet stands the harder it is to predict the shockwave/pressure areas and the more they will change with atmospherics. the slower the spin the more the bullet will want to lie parallel to the direction it is traveling. This helps with wind effects also.</p><p>a bullet coming apart would probably start in the chamber under high pressures and may not directly correlate to velocities but may also relate to twist rate as faster rates cause higher pressures. a thicker jacket may help with this.gun)</p></blockquote><p></p>
[QUOTE="load, post: 636706, member: 22789"] I dont have all the answers to exterior ballistics but one of the reasons for a slower twist and increased accuracy could be 1- magnus effect. the faster a bullet leaves the barrel the higher the rpm it is spinning at. at 3200 fps and 1/9.5 a bullet is spinning at 242496 rpm, at 3200 fps and 1/11 is spinning at 209280. think of a top spinning it fights gravity and wants to "stand up" The more the bullet stands the harder it is to predict the shockwave/pressure areas and the more they will change with atmospherics. the slower the spin the more the bullet will want to lie parallel to the direction it is traveling. This helps with wind effects also. a bullet coming apart would probably start in the chamber under high pressures and may not directly correlate to velocities but may also relate to twist rate as faster rates cause higher pressures. a thicker jacket may help with this.gun) [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
how fast is to fast-Berger VLDs
Top