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<blockquote data-quote="Grumulkin" data-source="post: 2713028" data-attributes="member: 8239">There was an article in Handloader magazine several years ago in which the author did extensive testing for accuracy, case longevity, etc. in the 308 Winchester.&nbsp; In his test, CCI 250 (large rifle magnum) primers gave the best accuracy.&nbsp; The primer that came in second in the accuracy department was the Federal 215GM (another magnum primer).&nbsp; The powder used was Varget.I frequently try magnum primers in various loads I&#039;m working up.&nbsp; What I&#039;ve found is that you don&#039;t have to use magnum primers with ball powders and that sometimes a magnum primer is beneficial even in a smaller case or with stick powders.&nbsp; The only time I ever had to adjust a load down when using a magnum primer was when I tried large rifle magnum primers in a 44 Remington Magnum.&nbsp; Of course, if your load is on the bleeding edge of too hot, you should decrease the load a bit and work back up.</blockquote>

[QUOTE="Grumulkin, post: 2713028, member: 8239"] There was an article in Handloader magazine several years ago in which the author did extensive testing for accuracy, case longevity, etc. in the 308 Winchester. In his test, CCI 250 (large rifle magnum) primers gave the best accuracy. The primer that came in second in the accuracy department was the Federal 215GM (another magnum primer). The powder used was Varget. I frequently try magnum primers in various loads I'm working up. What I've found is that you don't have to use magnum primers with ball powders and that sometimes a magnum primer is beneficial even in a smaller case or with stick powders. The only time I ever had to adjust a load down when using a magnum primer was when I tried large rifle magnum primers in a 44 Remington Magnum. Of course, if your load is on the bleeding edge of too hot, you should decrease the load a bit and work back up. [/QUOTE]

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