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
Measuring the "WEB" area of the case for pressure signs?
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="Clark" data-source="post: 244356" data-attributes="member: 6600"><p>I have overloaded allot of cases to see what happens.</p><p></p><p>A) The 10mm is the weakest case head. It has a large Boxer primer pocket and deep extractor groove, making a thin spot in the web that sees the radial expansion of gas pressure and axial compression of the case pushing against the the breech face. </p><p></p><p>B) The 1889 7.65x53m Mauser case head fitted with Large rifle Boxer primer pocket is stronger and good for ~ 62,000 psi for long brass life. There are many cartridges that use this; 22-250, 243W, 6mmRem, 250 Sav, 257 Roberts, 25-06, 260 Rem, 270, 7mm-08, 7x57mm, 280 Rem, 308W, 30-06, 8x57mm, 338 Federal, 338-06, and 35 Whelen.</p><p></p><p>C) The 6mmBR case head has Mauser dimensions, but uses a small rifle Boxer primer pocket. This makes the web so strong that the primer is the weakest link. A CCI450 magnum primer and a custom bushed firing pin allow the usable pressure to be very high.</p><p></p><p>What does it all mean?</p><p>In some cases, the web is the weak link, and loads must be adjusted for long brass life by monitoring the primer pocket growth to insure there are no loose primers. Other webs are built better.</p></blockquote><p></p>
[QUOTE="Clark, post: 244356, member: 6600"] I have overloaded allot of cases to see what happens. A) The 10mm is the weakest case head. It has a large Boxer primer pocket and deep extractor groove, making a thin spot in the web that sees the radial expansion of gas pressure and axial compression of the case pushing against the the breech face. B) The 1889 7.65x53m Mauser case head fitted with Large rifle Boxer primer pocket is stronger and good for ~ 62,000 psi for long brass life. There are many cartridges that use this; 22-250, 243W, 6mmRem, 250 Sav, 257 Roberts, 25-06, 260 Rem, 270, 7mm-08, 7x57mm, 280 Rem, 308W, 30-06, 8x57mm, 338 Federal, 338-06, and 35 Whelen. C) The 6mmBR case head has Mauser dimensions, but uses a small rifle Boxer primer pocket. This makes the web so strong that the primer is the weakest link. A CCI450 magnum primer and a custom bushed firing pin allow the usable pressure to be very high. What does it all mean? In some cases, the web is the weak link, and loads must be adjusted for long brass life by monitoring the primer pocket growth to insure there are no loose primers. Other webs are built better. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Measuring the "WEB" area of the case for pressure signs?
Top