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 deciphering OCW test 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="green 788" data-source="post: 101778" data-attributes="member: 3781"><p>DC,</p><p></p><p>Thanks for the photo. That helps illustrate things...</p><p></p><p>That number 2 group will not be repeatable. If you look at it this way, all it's going to take is a slight pressure drop, and it's shooting just like group number 1. Or a slight pressure increase, and it'll be shooting like group number 3. A pressure drop or increase can be caused by an odd brass case, hot or cool primer, very cold or very warm weather, etc. </p><p></p><p>I've got to say--based on your results with Varget between 36 and 39 grains (which you say were not good) and the results we see here--this powder/bullet combo is probably not going to work. <em>This is assuming that your rifle is shooting tight with the AA powder you mention.</em> If you're not getting .5" groups at 100 yards with any other bullet and/or powder, then I would look to scope and mount issues as the possible culprit. Also, see if the bore is heavily laiden with copper--another possibility.</p><p></p><p>If, however, the rifle is indeed shooting well with other powders or bullets, then I would abandon the idea of using the Varget with these particular bullets.</p><p></p><p>You might try 38.0 grains one more time. That charge should do much better than groups 1, 3, 4, and 5. I think that group 2 is a fluke, but you may want to try it again to see what happens.</p><p></p><p>Too, based on the "scatter group," which I believe is group number 3--you should find another accuracy node at 40.8 grains. That's well over max in most books, but if you're not getting any pressure signs at 40.5, you should be alright to test 40.8 grains.</p><p></p><p>What lot number is the Varget you're using? (Should be on an orange label on the bottom of the can, or on the main label if it's a newer lot).</p><p></p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="green 788, post: 101778, member: 3781"] DC, Thanks for the photo. That helps illustrate things... That number 2 group will not be repeatable. If you look at it this way, all it's going to take is a slight pressure drop, and it's shooting just like group number 1. Or a slight pressure increase, and it'll be shooting like group number 3. A pressure drop or increase can be caused by an odd brass case, hot or cool primer, very cold or very warm weather, etc. I've got to say--based on your results with Varget between 36 and 39 grains (which you say were not good) and the results we see here--this powder/bullet combo is probably not going to work. [i]This is assuming that your rifle is shooting tight with the AA powder you mention.[/i] If you're not getting .5" groups at 100 yards with any other bullet and/or powder, then I would look to scope and mount issues as the possible culprit. Also, see if the bore is heavily laiden with copper--another possibility. If, however, the rifle is indeed shooting well with other powders or bullets, then I would abandon the idea of using the Varget with these particular bullets. You might try 38.0 grains one more time. That charge should do much better than groups 1, 3, 4, and 5. I think that group 2 is a fluke, but you may want to try it again to see what happens. Too, based on the "scatter group," which I believe is group number 3--you should find another accuracy node at 40.8 grains. That's well over max in most books, but if you're not getting any pressure signs at 40.5, you should be alright to test 40.8 grains. What lot number is the Varget you're using? (Should be on an orange label on the bottom of the can, or on the main label if it's a newer lot). Dan [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Need help deciphering OCW test results
Top