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
Perplexed by loads
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="Joshm28" data-source="post: 1061431" data-attributes="member: 89251"><p>Just a little background...I got into reloading about 2 years ago. I finally got around to buying a chronograph to check fps in order to order some Kenton Turrets. I tested 3 rifles, a Sig SHR970 300wm, a tikka 300 wm and my custom 6.5-284. All loads have been developed based on 100 yard group accuracy. The 300 loads shoot just under an inch and the 6.5 will shoot .25" if I do my part.</p><p></p><p>Now the question I have is in regards to the Extreme Spread and Standard Deviation of the loads. The Loads for the sig produced an ES of 38 and a SD of 19.3, the load for the Tikka was a little better with an ES of 23 and SD of 11.8. What surprised me the most was the 6.5, it produced an ES of 88 and SD of 31.9. </p><p></p><p>I use Lapua Brass for the 6.5 and run 48.5g of IMR4831. I manually weigh each charge on a digital scale and check throughout the process with a balance beam scale. Bullets are 140g SSTs, which was not my number 1 choice but they shoot so well I decided to just keep running them. What could be causing these higher numbers? My process seems to be working based on the other loads but this is perplexing.</p><p></p><p>Any help is greatly appreciated.</p></blockquote><p></p>
[QUOTE="Joshm28, post: 1061431, member: 89251"] Just a little background...I got into reloading about 2 years ago. I finally got around to buying a chronograph to check fps in order to order some Kenton Turrets. I tested 3 rifles, a Sig SHR970 300wm, a tikka 300 wm and my custom 6.5-284. All loads have been developed based on 100 yard group accuracy. The 300 loads shoot just under an inch and the 6.5 will shoot .25" if I do my part. Now the question I have is in regards to the Extreme Spread and Standard Deviation of the loads. The Loads for the sig produced an ES of 38 and a SD of 19.3, the load for the Tikka was a little better with an ES of 23 and SD of 11.8. What surprised me the most was the 6.5, it produced an ES of 88 and SD of 31.9. I use Lapua Brass for the 6.5 and run 48.5g of IMR4831. I manually weigh each charge on a digital scale and check throughout the process with a balance beam scale. Bullets are 140g SSTs, which was not my number 1 choice but they shoot so well I decided to just keep running them. What could be causing these higher numbers? My process seems to be working based on the other loads but this is perplexing. Any help is greatly appreciated. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Perplexed by loads
Top