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The Range
Ammo & Reloading
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<blockquote data-quote="swampratt" data-source="post: 3686149" data-attributes="member: 15054"><p>I do a lot of testing and did a lot when making loads for my 5.56 and .223</p><p>I found my groups stayed much tighter with CCI 450 magnum primers than the CCI 400 when the temps changed outside.</p><p></p><p>I was using CCI 400's and I would have a good load at 17 F temps but when that temp got to 55 the groups went to crap.</p><p>I then had to find a load that shot at 55 degrees and when I did it went to crap when it hit 95 f outside.</p><p></p><p>Varget was the powder and then I went to H4895 and it was better and I did some research and tried CCI 450's and I only use those now for all my 5.56 and .223 loads.</p><p></p><p>If you are not looking for sub moa accuracy it does not matter.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3686149, member: 15054"] I do a lot of testing and did a lot when making loads for my 5.56 and .223 I found my groups stayed much tighter with CCI 450 magnum primers than the CCI 400 when the temps changed outside. I was using CCI 400's and I would have a good load at 17 F temps but when that temp got to 55 the groups went to crap. I then had to find a load that shot at 55 degrees and when I did it went to crap when it hit 95 f outside. Varget was the powder and then I went to H4895 and it was better and I did some research and tried CCI 450's and I only use those now for all my 5.56 and .223 loads. If you are not looking for sub moa accuracy it does not matter. [/QUOTE]
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