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Rifles, Reloading, Optics, Equipment
Reloading
7mm Rem Mag Case Stretch
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<blockquote data-quote="Prairie Sasquatch" data-source="post: 2884870" data-attributes="member: 124243"><p>I've recently started loading some new brass for my 7 Rem Mag. I've never loaded new brass for this gun. In fact I've loaded very little for it in the past as I bought it for a moose hunt and got a decent load put together and shot a moose. Now I'm trying to work up a longer range load with the 162 ELDX. </p><p></p><p>New RP brass measures 2.1045" at the shoulder. First firing brass measured 2.1170" at shoulder. Second firing measured 2.1200" at shoulder and still chambers without any resistance. </p><p></p><p>I have a few questions. Is this excessive stretch for the 7 mag and do I need to worry about case head separation? Second, will the cases settled down now after this second firing and should I just wait until later for any shoulder bump. </p><p></p><p>I'm not running hot loads. I found a mid range load that shoots well while once firing and the second loading of this required a .3 grain drop in powder charge to maintain same accuracy and velocity. </p><p></p><p>Any thoughts are appreciated.</p></blockquote><p></p>
[QUOTE="Prairie Sasquatch, post: 2884870, member: 124243"] I’ve recently started loading some new brass for my 7 Rem Mag. I’ve never loaded new brass for this gun. In fact I’ve loaded very little for it in the past as I bought it for a moose hunt and got a decent load put together and shot a moose. Now I’m trying to work up a longer range load with the 162 ELDX. New RP brass measures 2.1045” at the shoulder. First firing brass measured 2.1170” at shoulder. Second firing measured 2.1200” at shoulder and still chambers without any resistance. I have a few questions. Is this excessive stretch for the 7 mag and do I need to worry about case head separation? Second, will the cases settled down now after this second firing and should I just wait until later for any shoulder bump. I’m not running hot loads. I found a mid range load that shoots well while once firing and the second loading of this required a .3 grain drop in powder charge to maintain same accuracy and velocity. Any thoughts are appreciated. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm Rem Mag Case Stretch
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