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
Equipment Discussions
Allen Mags?
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="Fiftydriver" data-source="post: 86310" data-attributes="member: 10"><p>Roy,</p><p></p><p>It has been my experience, if you take the same powder charge and load two different brand cases, the one with the smallest powder capacity will produce the higher velocity of the two with this same load.</p><p></p><p>That said, on average, you can load Win brass to higher pressures then Rem brass simply because the brass used in the Win cases is "harder" then the Rem brass and resists case head expansion and primer pocket loosening better then the softer Rem brass.</p><p></p><p>In my tests with the two different types of 300 Dakota brass used in my 6.5mm AX. The two cases have very similiar case capacities with the 23 grain lighter case having about a 3 grains larger powder capacity.</p><p></p><p>This tells me that dimensionally the two cases are very similiar as far as case head thickness, body wall thickness and such. The reason they are so different in weight is because the allow used in the heavier case is simply more dense then the brass alloy used in the lighter weight cases.</p><p></p><p>In the top velocity potential I listed, these are NOT for the same load in each brass. Instead it is the top level that I could reach that was 1 grain under the point where the primer pockets began to loosen after three firings.</p><p></p><p>In the heavier cases I was able to reach 90.0 gr of WC872 under the 140 gr Partition with 91.0 gr resulting in primer pockets beginning to loosed at what I feel is premature timing.</p><p></p><p>With the lighter weight cases, they reached the level of primer pocket loosening at roughly 86.0 gr of WC872 under the same bullet.</p><p></p><p>This tells me that the denser alloy handles the higher pressures better then the light cases. I am sure the chamber pressure with the heavy cases is significantly higher then the other loads. Thus the reason for the higher velocity potential.</p><p></p><p>What I am saying is that the heavier brass is able to handle this higher pressure level better then the light weight brass.</p><p></p><p>Does that make any sense /ubbthreads/images/graemlins/confused.gif?? Probably did not help any!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 86310, member: 10"] Roy, It has been my experience, if you take the same powder charge and load two different brand cases, the one with the smallest powder capacity will produce the higher velocity of the two with this same load. That said, on average, you can load Win brass to higher pressures then Rem brass simply because the brass used in the Win cases is "harder" then the Rem brass and resists case head expansion and primer pocket loosening better then the softer Rem brass. In my tests with the two different types of 300 Dakota brass used in my 6.5mm AX. The two cases have very similiar case capacities with the 23 grain lighter case having about a 3 grains larger powder capacity. This tells me that dimensionally the two cases are very similiar as far as case head thickness, body wall thickness and such. The reason they are so different in weight is because the allow used in the heavier case is simply more dense then the brass alloy used in the lighter weight cases. In the top velocity potential I listed, these are NOT for the same load in each brass. Instead it is the top level that I could reach that was 1 grain under the point where the primer pockets began to loosen after three firings. In the heavier cases I was able to reach 90.0 gr of WC872 under the 140 gr Partition with 91.0 gr resulting in primer pockets beginning to loosed at what I feel is premature timing. With the lighter weight cases, they reached the level of primer pocket loosening at roughly 86.0 gr of WC872 under the same bullet. This tells me that the denser alloy handles the higher pressures better then the light cases. I am sure the chamber pressure with the heavy cases is significantly higher then the other loads. Thus the reason for the higher velocity potential. What I am saying is that the heavier brass is able to handle this higher pressure level better then the light weight brass. Does that make any sense [img]/ubbthreads/images/graemlins/confused.gif[/img]?? Probably did not help any!! Kirby Allen(50) [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Equipment Discussions
Allen Mags?
Top