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Rifles, Reloading, Optics, Equipment
Reloading
Low pressure sign??? 300RUM
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<blockquote data-quote="taly01" data-source="post: 443069" data-attributes="member: 28443"><p>I agree, I was often getting the <u>exact same case dimple near the neck</u> as in your pictures with the first 1-2 shots in a clean barrel using CCI BR2 primers and 4831SC in a 6.5x55. </p><p> </p><p>In hammer and bench testing the primers <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> I found 1 in 3 was much weaker than "normal", I just think I had a bad batch, I chucked that brick of primers :cry: and got some RLRM, no problems with case dimpling anymore.</p><p> </p><p>IMHO the case neck dimple is caused by too weak primer to ignite a slow powder completely, then the powder grains ignite a few inches down the barrel and suck the case in? </p><p> </p><p>Anyway 300RUM almost certainly needs Fed215 primers.</p></blockquote><p></p>
[QUOTE="taly01, post: 443069, member: 28443"] I agree, I was often getting the [U]exact same case dimple near the neck[/U] as in your pictures with the first 1-2 shots in a clean barrel using CCI BR2 primers and 4831SC in a 6.5x55. In hammer and bench testing the primers :D I found 1 in 3 was much weaker than "normal", I just think I had a bad batch, I chucked that brick of primers :cry: and got some RLRM, no problems with case dimpling anymore. IMHO the case neck dimple is caused by too weak primer to ignite a slow powder completely, then the powder grains ignite a few inches down the barrel and suck the case in? Anyway 300RUM almost certainly needs Fed215 primers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Low pressure sign??? 300RUM
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