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
Reloading
Need help with chrono results!
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="J E Custom" data-source="post: 168864" data-attributes="member: 2736"><p>Dodge</p><p></p><p>I had the same problem with my 7 STW an tried a lot of</p><p>things an this is what fixed my velocity spreads and S D's.</p><p></p><p>The STW is a large over bore case but not so large that</p><p>it "requires" 215 mag primers to ignite uniformly even </p><p>when using very slow powder like H5010.</p><p></p><p>So I switched to Rem 9 1/2 mag and this was the results.</p><p></p><p>In a custom 31" barreled rifle with 140gr blis tip and H 5010</p><p>fed 215 primer velocity was 3569 ft/sec and S D was 23 ft/sec</p><p>With a rem 9 1/2 mag primer velocity was 3537 ft/sec and </p><p>S D was 11.</p><p></p><p>I have found that in cases that hold more than 95 grs a 215</p><p>is almost allways required. below that depending on bullet</p><p>weight and load density a 9 1/2 will work even better most</p><p>of the time, Some velocity loss is normal (25 to 50 ft/sec)</p><p>but Standard Deviations normaly are cut in half improving</p><p>accurace.</p><p></p><p>If your are doing all the things that have been suggested then</p><p>try the primer change.</p><p></p><p>Just another option</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 168864, member: 2736"] Dodge I had the same problem with my 7 STW an tried a lot of things an this is what fixed my velocity spreads and S D's. The STW is a large over bore case but not so large that it "requires" 215 mag primers to ignite uniformly even when using very slow powder like H5010. So I switched to Rem 9 1/2 mag and this was the results. In a custom 31" barreled rifle with 140gr blis tip and H 5010 fed 215 primer velocity was 3569 ft/sec and S D was 23 ft/sec With a rem 9 1/2 mag primer velocity was 3537 ft/sec and S D was 11. I have found that in cases that hold more than 95 grs a 215 is almost allways required. below that depending on bullet weight and load density a 9 1/2 will work even better most of the time, Some velocity loss is normal (25 to 50 ft/sec) but Standard Deviations normaly are cut in half improving accurace. If your are doing all the things that have been suggested then try the primer change. Just another option J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Need help with chrono results!
Top