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
52gr. A-max problems
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="dwm" data-source="post: 26367" data-attributes="member: 1136"><p>I shoot 52 AMAX out of my 223 with a 9 twist at almost 3300 fps with good results and out of my 22-250 at almost 3700 fps with a 12 twist also with good results.</p><p></p><p>.223:</p><p></p><p>3300 f/s with a 9 in/rev twist rate = 264,000 rpm</p><p></p><p>They don't blow up at this RPM.</p><p></p><p>22-250:</p><p></p><p>3700 f/s with a 12 in/rev twist rate = 222,000 rpm</p><p></p><p>Still ok ...</p><p></p><p>220 Swift:</p><p></p><p>4250 f/s with a 16 in/rev twist rate = 191,250 rpm</p><p></p><p>4330 f/s with a 16 in/rev twist rate = 194,850 rpm</p><p></p><p>These are pretty high rpm, almost what I was getting out of my 22-250 ...</p><p></p><p>I would think a 1 in 16 twist should be able to stablize a 52 Gr AMAX as long as they are going fast enough. Bullet RPM is a function of forward velocity.</p><p></p><p>I'm sure stability is way more complicated than this, but one would think this would be ok ...</p><p></p><p>Doug</p></blockquote><p></p>
[QUOTE="dwm, post: 26367, member: 1136"] I shoot 52 AMAX out of my 223 with a 9 twist at almost 3300 fps with good results and out of my 22-250 at almost 3700 fps with a 12 twist also with good results. .223: 3300 f/s with a 9 in/rev twist rate = 264,000 rpm They don't blow up at this RPM. 22-250: 3700 f/s with a 12 in/rev twist rate = 222,000 rpm Still ok ... 220 Swift: 4250 f/s with a 16 in/rev twist rate = 191,250 rpm 4330 f/s with a 16 in/rev twist rate = 194,850 rpm These are pretty high rpm, almost what I was getting out of my 22-250 ... I would think a 1 in 16 twist should be able to stablize a 52 Gr AMAX as long as they are going fast enough. Bullet RPM is a function of forward velocity. I'm sure stability is way more complicated than this, but one would think this would be ok ... Doug [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
52gr. A-max problems
Top