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
Acceptable Powder Charge variance
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="Greyfox" data-source="post: 1312206" data-attributes="member: 10291"><p>I weigh my charges to .1gr using a Charge-master. Loading cartridges from .223 to 300WM and have found that I've been able to achieve ES that is under 15FPS and SD's less then 7 with this level of precision. I do believe that it is imperative that the optimum node is determined when developing a load. I don't buy the belief of the gas operating AR15 producing higher velocity variations then a bolt rifle. I have owned and shot a 6mmAR(Whitely upper).in competition (300 yard egg shoots) for over 7 years. Using charges of Reloader 15, 28.2gr, 107gr SMK, BR4, Lapua brass, have consistently achieved ES of less then 15FPS, SD6. Velocity average is 2750FPS and accuracy runs .25MOA or better. My rifle has over 2000 rounds through it, and it has maintained this performance. I have seen this result achieved by other shooters using the Whitely AR in this caliber. As with bolt rifles, the quality of the build and the load makes a difference in performance. </p><p>I recall a US military study from many years ago conducted on the 30-06 using match grade rifles that claimed a .1gr variation in charge would result in an approximate .1 MOA change in POI at 1000 yards. I remember coming to the conclusion that if this proved true, it would suffice for my shooting needs. This has since proven to be the case</p><p></p><p>Recent test group of my 6mmAR at 100 yards.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1312206, member: 10291"] I weigh my charges to .1gr using a Charge-master. Loading cartridges from .223 to 300WM and have found that I've been able to achieve ES that is under 15FPS and SD's less then 7 with this level of precision. I do believe that it is imperative that the optimum node is determined when developing a load. I don't buy the belief of the gas operating AR15 producing higher velocity variations then a bolt rifle. I have owned and shot a 6mmAR(Whitely upper).in competition (300 yard egg shoots) for over 7 years. Using charges of Reloader 15, 28.2gr, 107gr SMK, BR4, Lapua brass, have consistently achieved ES of less then 15FPS, SD6. Velocity average is 2750FPS and accuracy runs .25MOA or better. My rifle has over 2000 rounds through it, and it has maintained this performance. I have seen this result achieved by other shooters using the Whitely AR in this caliber. As with bolt rifles, the quality of the build and the load makes a difference in performance. I recall a US military study from many years ago conducted on the 30-06 using match grade rifles that claimed a .1gr variation in charge would result in an approximate .1 MOA change in POI at 1000 yards. I remember coming to the conclusion that if this proved true, it would suffice for my shooting needs. This has since proven to be the case Recent test group of my 6mmAR at 100 yards. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Acceptable Powder Charge variance
Top