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
procedure for measuring case volume
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="rscott5028" data-source="post: 639572" data-attributes="member: 24624"><p>I don't know. I use benchrest primers because I expect them to be more consistent. It would take a much more sophisticated study to isolate that as a variable. </p><p> </p><p>Assuming individual primers within a lot have much variability, I wouldn't know how to sort them prior to shooting and once the hammer drops, it's too late to recall the bullet. </p><p> </p><p></p><p> </p><p>I think the rifle was positioned and held as well and consistent as can be expected without a machine rest. I think the low ES/SD might support that. But, that's not to say that there might be shot to shot variability introduced by the shooter's hold. e.g. There were a few with high MV that could be the result of a firm shoulder or possibly letting the cartridge warm too long waiting for the wind. Similarly, there were a few with low MV that might be from a loose grip/shoulder. </p><p> </p><p>I assume that's what your question relates too? </p><p> </p><p></p><p> </p><p>The powder charges were carefully weighed to the nearest .02 gr which is tighter control than the typical reloading scale is capable of. I re-verified the empty tare weight of the pan frequently and didn't observe any drift. </p><p> </p><p>So, I think I did the best I could to manage that variable. </p><p> </p><p>I will say from the group size and POA/POI that practice and reading conditions from shot to shot and string to string is many times over more directly correlated to actual results. </p><p> </p><p>e.g. His best group was about 1.5" with only about .2" vertical spread which I'd be tickled with any day. However, it was about 2.5" low and left which would've been either a near miss or a goose egg on the largest 3 of 8 clays in the upcoming cometition. </p><p> </p><p>Hence, my son needn't consternate over the minutia of case volume and primers. He needs to focus on technique, flags, and mirage. Since I'm not the trigger man, I have no problem toiling with it for a while. </p><p> </p><p>Thanks for the feedback!</p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 639572, member: 24624"] I don't know. I use benchrest primers because I expect them to be more consistent. It would take a much more sophisticated study to isolate that as a variable. Assuming individual primers within a lot have much variability, I wouldn't know how to sort them prior to shooting and once the hammer drops, it's too late to recall the bullet. I think the rifle was positioned and held as well and consistent as can be expected without a machine rest. I think the low ES/SD might support that. But, that's not to say that there might be shot to shot variability introduced by the shooter's hold. e.g. There were a few with high MV that could be the result of a firm shoulder or possibly letting the cartridge warm too long waiting for the wind. Similarly, there were a few with low MV that might be from a loose grip/shoulder. I assume that's what your question relates too? The powder charges were carefully weighed to the nearest .02 gr which is tighter control than the typical reloading scale is capable of. I re-verified the empty tare weight of the pan frequently and didn't observe any drift. So, I think I did the best I could to manage that variable. I will say from the group size and POA/POI that practice and reading conditions from shot to shot and string to string is many times over more directly correlated to actual results. e.g. His best group was about 1.5" with only about .2" vertical spread which I'd be tickled with any day. However, it was about 2.5" low and left which would've been either a near miss or a goose egg on the largest 3 of 8 clays in the upcoming cometition. Hence, my son needn't consternate over the minutia of case volume and primers. He needs to focus on technique, flags, and mirage. Since I'm not the trigger man, I have no problem toiling with it for a while. Thanks for the feedback! -- richard [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
procedure for measuring case volume
Top