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
.308 / Berger VLD's of differing weights
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="Mike6158" data-source="post: 361754" data-attributes="member: 1039"><p><strong>Re: .308 / Berger VLD's of differning weights</strong></p><p></p><p></p><p></p><p>Thanks for replying Bryan.</p><p></p><p>I'm using the analyzer/twist and stability module in Loadbase. </p><p></p><p>Here's the parameters that I used:</p><p></p><p><strong>Bullet diameter:</strong> .308</p><p><strong></strong></p><p><strong>Bullet Length:</strong> 1.375 (I mic'd a few of the bullets and they were all within .001 of this value</p><p><strong></strong></p><p><strong>Bullet Weight:</strong> 190 gr</p><p></p><p><strong>MV:</strong> 2,600 fps</p><p></p><p>Environment Conditions </p><p>29.92" Hg</p><p>59°F</p><p>33% RH</p><p><strong></strong></p><p><strong>Twist Rate:</strong> 1:12</p><p></p><p>Miller Method results: 1.35 Under Stabilized</p><p>Greenhill Method results: 1.49 Under Stabilized</p><p></p><p>At 2,900 fps the results change to:</p><p></p><p>Miller Method results: 1.40 Under Stabilized</p><p>Greenhill Method results: 1.49 Under Stabilized <strong><-- didn't change</strong></p><p></p><p>At 3,000 fps the results change to:</p><p></p><p>Miller Method results: 1.41 Under Stabilized</p><p>Greenhill Method results: 2.14 Fully Stabilized <strong><-- Big jump</strong></p><p></p><p></p><p>On a side note- without blowing myself up or damaging my firearm, I determined the max charge for IMR 4350 and the 190 gr VLD this morning. 48.5 grs has slight primer flattening but no other indicators. I'll back off 10% from there and work my way back up to a load that shoots well.</p></blockquote><p></p>
[QUOTE="Mike6158, post: 361754, member: 1039"] [b]Re: .308 / Berger VLD's of differning weights[/b] Thanks for replying Bryan. I'm using the analyzer/twist and stability module in Loadbase. Here's the parameters that I used: [B]Bullet diameter:[/B] .308 [B] Bullet Length:[/B] 1.375 (I mic'd a few of the bullets and they were all within .001 of this value [B] Bullet Weight:[/B] 190 gr [B]MV:[/B] 2,600 fps Environment Conditions 29.92" Hg 59°F 33% RH [B] Twist Rate:[/B] 1:12 Miller Method results: 1.35 Under Stabilized Greenhill Method results: 1.49 Under Stabilized At 2,900 fps the results change to: Miller Method results: 1.40 Under Stabilized Greenhill Method results: 1.49 Under Stabilized [B]<-- didn't change[/B] At 3,000 fps the results change to: Miller Method results: 1.41 Under Stabilized Greenhill Method results: 2.14 Fully Stabilized [B]<-- Big jump[/B] On a side note- without blowing myself up or damaging my firearm, I determined the max charge for IMR 4350 and the 190 gr VLD this morning. 48.5 grs has slight primer flattening but no other indicators. I'll back off 10% from there and work my way back up to a load that shoots well. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.308 / Berger VLD's of differing weights
Top