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
Does a short barrel need a faster twist?
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="BountyHunter" data-source="post: 321261" data-attributes="member: 12"><p>It is not the spinning of the bullet longer time. It is RPMs, which is all twist and has nothing to do with barrel length per se. </p><p> </p><p>So long or short it does not matter, it is the twist as long a MVs stay in the same ballpark. Change MV dramatically though, and it will change the need for twist changes.</p><p> </p><p>Perfect example is the 240 SMK. </p><p> </p><p>Sierra says it needs a 1-9 because it was originally designed for the MTU shooting 1000 yds at 2650 fps. Push it to 2850-2900 plus, and guess what, will shoot like a house afire in a 1-10. Drop the 240 SMK in a Whisper (221 fireball necked up to 30 cal) and the MV is down to 950 fps and you need to go to a 1-8 twist.</p><p> </p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 321261, member: 12"] It is not the spinning of the bullet longer time. It is RPMs, which is all twist and has nothing to do with barrel length per se. So long or short it does not matter, it is the twist as long a MVs stay in the same ballpark. Change MV dramatically though, and it will change the need for twist changes. Perfect example is the 240 SMK. Sierra says it needs a 1-9 because it was originally designed for the MTU shooting 1000 yds at 2650 fps. Push it to 2850-2900 plus, and guess what, will shoot like a house afire in a 1-10. Drop the 240 SMK in a Whisper (221 fireball necked up to 30 cal) and the MV is down to 950 fps and you need to go to a 1-8 twist. BH [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Does a short barrel need a faster twist?
Top