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
Gunsmithing
New build: powder burning on and above case shoulder
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="str8shoot" data-source="post: 499656" data-attributes="member: 26034"><p>I just got my 7mm rem mag back from the smith, where he trued the action and put on a new Mcgowen barrel. I loaded up some rounds in new Win brass and went to break in the new barrel. </p><p> Upon firing I noticed the shoulders on my cases were blackened after firing. A few cases had six lines (from the six groove barrel) half way up the case body. At first I thought I wasn't getting the chamber dry after cleaning, but that wasn't it. After I fired all 21 rounds with many cleanings I had 21 cases all with black necks and shoulders. 5 or so had the lines up the case body.</p><p> So I got home and measured up some cases with my headspace gauge. It wasn't too far off (.009 shorter) than my old fired rounds so I figured my head space was probably OK. I set up my fl die to bump the shoulders .001. This time I loaded up incremental charges to start load development. I thought maybe my break in rounds were a little under pressure in this rifle. All fired cases showed pretty much the same results as the new brass.</p><p> Obviously I may need to talk to the smith that built this rifle but I thought I would run it by some of you guys first.</p><p> I am very happy with the accuracy and the velocity of the rifle so far but I wonder if I am causing damage to my chamber or any thing else?</p></blockquote><p></p>
[QUOTE="str8shoot, post: 499656, member: 26034"] I just got my 7mm rem mag back from the smith, where he trued the action and put on a new Mcgowen barrel. I loaded up some rounds in new Win brass and went to break in the new barrel. Upon firing I noticed the shoulders on my cases were blackened after firing. A few cases had six lines (from the six groove barrel) half way up the case body. At first I thought I wasn't getting the chamber dry after cleaning, but that wasn't it. After I fired all 21 rounds with many cleanings I had 21 cases all with black necks and shoulders. 5 or so had the lines up the case body. So I got home and measured up some cases with my headspace gauge. It wasn't too far off (.009 shorter) than my old fired rounds so I figured my head space was probably OK. I set up my fl die to bump the shoulders .001. This time I loaded up incremental charges to start load development. I thought maybe my break in rounds were a little under pressure in this rifle. All fired cases showed pretty much the same results as the new brass. Obviously I may need to talk to the smith that built this rifle but I thought I would run it by some of you guys first. I am very happy with the accuracy and the velocity of the rifle so far but I wonder if I am causing damage to my chamber or any thing else? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
New build: powder burning on and above case shoulder
Top