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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM Velocity during Ladder test 400yrds
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<blockquote data-quote="Canadian Bushman" data-source="post: 916167" data-attributes="member: 41122"><p>Cratering of a primer is not a clear indication of pressure. Especially on used rifles where the firing pin has wallowed out its bore. Ejector marks are much more indicative of a high pressure situation and are usually preceeded by flattening of the primer, then the loosening of its pockets. I usually test for a clear ejector mark or severely flattened primers since headspace can also cause flattened primers. Finding a true max load with an understood or standard weight case is valuable info.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 916167, member: 41122"] Cratering of a primer is not a clear indication of pressure. Especially on used rifles where the firing pin has wallowed out its bore. Ejector marks are much more indicative of a high pressure situation and are usually preceeded by flattening of the primer, then the loosening of its pockets. I usually test for a clear ejector mark or severely flattened primers since headspace can also cause flattened primers. Finding a true max load with an understood or standard weight case is valuable info. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM Velocity during Ladder test 400yrds
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