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
Brass weight... How important?
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="ntsqd" data-source="post: 1630285" data-attributes="member: 93138"><p>If two conditions are met, case lengths are all the same and have been sized or fired in the same chamber so that they all have the same exterior dimensions then what isn't brass volume in that chamber has to be air volume. That air volume is case powder capacity. The physics of it won't allow for anything else.</p><p></p><p>The density of the brass that the cases are made from probably does vary from lot to lot. Within one lot of brass from which the cases are made the density shouldn't vary enough to matter. These are pretty specific alloys, I expect the case mfg to exercise significant control over this. Whether or not the lot of cases is all made from the same lot of metal is something that only the mfg has control over. A change in lot of metal should result in a new lot of cases, but perhaps that isn't always so.</p><p></p><p>So if the exterior dims are the same and the weight of the cases is the same, then their powder capacities are the same. Really doesn't matter where within the case that brass is distributed. For it to be different means that there is either a variable unaccounted for or (more likely) they fail one of the initial two conditions.</p><p></p><p><strong>EDIT:</strong> When I typed this I thought that it would be obvious, but as I stewed on it I realized that it may not be, so since I didn't say it I'm going to point out that the volumes of the flash hole, primer pocket and extraction groove are all deducted from the result above.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 1630285, member: 93138"] If two conditions are met, case lengths are all the same and have been sized or fired in the same chamber so that they all have the same exterior dimensions then what isn't brass volume in that chamber has to be air volume. That air volume is case powder capacity. The physics of it won't allow for anything else. The density of the brass that the cases are made from probably does vary from lot to lot. Within one lot of brass from which the cases are made the density shouldn't vary enough to matter. These are pretty specific alloys, I expect the case mfg to exercise significant control over this. Whether or not the lot of cases is all made from the same lot of metal is something that only the mfg has control over. A change in lot of metal should result in a new lot of cases, but perhaps that isn't always so. So if the exterior dims are the same and the weight of the cases is the same, then their powder capacities are the same. Really doesn't matter where within the case that brass is distributed. For it to be different means that there is either a variable unaccounted for or (more likely) they fail one of the initial two conditions. [B]EDIT:[/B] When I typed this I thought that it would be obvious, but as I stewed on it I realized that it may not be, so since I didn't say it I'm going to point out that the volumes of the flash hole, primer pocket and extraction groove are all deducted from the result above. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Brass weight... How important?
Top