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
Rifles, Bullets, Barrels & Ballistics
For those who NEVER clean their bore, or almost never
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="kiwikid" data-source="post: 1920363" data-attributes="member: 56094"><p>There is a write-up on page 150 of the Norma manual regarding gun care. They took one of the 7mm "Super Magnums" with a transducer fitted and a clean barrel. The peak pressure of the first 30 rounds was around 435 Mpa or 63000 psi but then pressures started to climb. The transducer broke at just over 300 rounds but they had hit 580 Mpa or 84000 psi which is above Proof Pressure. They state that the barrel never got hot as they only fired a few rounds and then let it cool to room temperature before continuing. At the end of the test they found that the diameter of the bore had reduced by .003" from what it was when clean.</p></blockquote><p></p>
[QUOTE="kiwikid, post: 1920363, member: 56094"] There is a write-up on page 150 of the Norma manual regarding gun care. They took one of the 7mm "Super Magnums" with a transducer fitted and a clean barrel. The peak pressure of the first 30 rounds was around 435 Mpa or 63000 psi but then pressures started to climb. The transducer broke at just over 300 rounds but they had hit 580 Mpa or 84000 psi which is above Proof Pressure. They state that the barrel never got hot as they only fired a few rounds and then let it cool to room temperature before continuing. At the end of the test they found that the diameter of the bore had reduced by .003" from what it was when clean. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
For those who NEVER clean their bore, or almost never
Top