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The Range
Ammo & Reloading
SPP versus SRP versus SPM Testing Results
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<blockquote data-quote="swampratt" data-source="post: 3501491" data-attributes="member: 15054"><p>I love tests like these thanks for sharing guys.</p><p>I have ran CCI 400, 450 and 550 through a bolt gun with a heavy load of 8208 powder to test </p><p>primer strength CCI 400's would have a hole in the primer the 450 and 550 never developed a hole.</p><p></p><p>With ball powder there was a definite velocity difference like 100fps less with the 550 primer vs the 400.</p><p>With stick powder there was not any difference in velocity.</p><p></p><p>I may need to redo that test.</p><p>I have read the 400 and 550 are the same but they are not.</p><p>When I personally contacted CCI they said they were not the same.</p><p></p><p>Others have contacted CCI and were told they were the same.</p><p>Like many here do your own testing.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3501491, member: 15054"] I love tests like these thanks for sharing guys. I have ran CCI 400, 450 and 550 through a bolt gun with a heavy load of 8208 powder to test primer strength CCI 400's would have a hole in the primer the 450 and 550 never developed a hole. With ball powder there was a definite velocity difference like 100fps less with the 550 primer vs the 400. With stick powder there was not any difference in velocity. I may need to redo that test. I have read the 400 and 550 are the same but they are not. When I personally contacted CCI they said they were not the same. Others have contacted CCI and were told they were the same. Like many here do your own testing. [/QUOTE]
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SPP versus SRP versus SPM Testing Results
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