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<blockquote data-quote="falconry2" data-source="post: 1451794" data-attributes="member: 578573">I use the CCIs also, good product. Difference in primer from the large rifle,magnum, and Bench Rest is the level of &quot;frizzence&quot; or the inherent ability for the primer to ignite the powder. Lets say the standard Large rifle is a 100 power, then the Magnum would be a 125 power, the Bench Rest might be a 105 power.&nbsp; That is a very simple way to introduce the idea. The more &quot;frizzence&quot; power the more penetration the primer flash wave enters the powder column and ignites the powder. In a Magnum, there is more powder to ignite, in the Bench Rest you want a quicker ignition and the large rifle is the average standard. It isn&#039;t just &quot;fizzence&quot; power involved with primers, there are different temperatures that the primers will produce also. &nbsp;I use Mag primers in my 300 WSM and large rifle in the 30-06 and 243. Some people use Mag primers in standard cartridges to get a quicker powder column response, or if they know they are going out in&nbsp; very cold weather. It might change your pressure profile slightly, and some people swear it improves accuracy in some guns, I think it&#039;s a wash. Your barrel wouldn&#039;t notice the difference in primers and you probably won&#039;t either.</blockquote>

[QUOTE="falconry2, post: 1451794, member: 578573"] I use the CCIs also, good product. Difference in primer from the large rifle,magnum, and Bench Rest is the level of "frizzence" or the inherent ability for the primer to ignite the powder. Lets say the standard Large rifle is a 100 power, then the Magnum would be a 125 power, the Bench Rest might be a 105 power. That is a very simple way to introduce the idea. The more "frizzence" power the more penetration the primer flash wave enters the powder column and ignites the powder. In a Magnum, there is more powder to ignite, in the Bench Rest you want a quicker ignition and the large rifle is the average standard. It isn't just "fizzence" power involved with primers, there are different temperatures that the primers will produce also. I use Mag primers in my 300 WSM and large rifle in the 30-06 and 243. Some people use Mag primers in standard cartridges to get a quicker powder column response, or if they know they are going out in very cold weather. It might change your pressure profile slightly, and some people swear it improves accuracy in some guns, I think it's a wash. Your barrel wouldn't notice the difference in primers and you probably won't either. [/QUOTE]

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