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
Blew a Primer _ Analysis
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="Pdvdh" data-source="post: 1389970" data-attributes="member: 4191"><p>Nope. No unusual scoring in the base of the primer pocket. That's the shadow of the primer anvil in contact with the base of the primer pocket. That's all I see in there. There is no visible torching anywhere, as is sometimes the case when high temperature and high pressure gases pierce out thru the firing pin indentation in the face of the primer, or around the perimeter of the primer. I think the gases escaped the perimeter of the primer not during the pressure rise, or even at peak pressure. I think the gas that escaped around the perimeter of the primer happened after peak pressure passed, and the brass case head relaxed to its permanently swelled to 0.215" ID, while the primer relaxed back down to it's current 0.211" OD. 0.004" of clearance for lower pressure gas to poof back against the bolt face. A smoke ring was visible on the face of the bolt. No etching/cutting as I've seen with pierced primers when full pressure gas torches out onto the bolt.</p><p></p><p>As far as the primers, I loaded the case the day before I shot it. All primers seated with normal resistance, meaning there was snug compression during seating.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1389970, member: 4191"] Nope. No unusual scoring in the base of the primer pocket. That's the shadow of the primer anvil in contact with the base of the primer pocket. That's all I see in there. There is no visible torching anywhere, as is sometimes the case when high temperature and high pressure gases pierce out thru the firing pin indentation in the face of the primer, or around the perimeter of the primer. I think the gases escaped the perimeter of the primer not during the pressure rise, or even at peak pressure. I think the gas that escaped around the perimeter of the primer happened after peak pressure passed, and the brass case head relaxed to its permanently swelled to 0.215" ID, while the primer relaxed back down to it's current 0.211" OD. 0.004" of clearance for lower pressure gas to poof back against the bolt face. A smoke ring was visible on the face of the bolt. No etching/cutting as I've seen with pierced primers when full pressure gas torches out onto the bolt. As far as the primers, I loaded the case the day before I shot it. All primers seated with normal resistance, meaning there was snug compression during seating. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Blew a Primer _ Analysis
Top