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Rifles, Reloading, Optics, Equipment
Reloading
Why Hammer Bullets Are Always Faster
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<blockquote data-quote="fta0303" data-source="post: 3040297" data-attributes="member: 43503"><p>Pressure signs often don't appear 'til 80,000 to 85,000 psi. If you see pressure signs, chances are you are well over SAAMI cartridge pressure limits. All other factors being equal (like barrel friction or bullet bearing surface), equivalent pressure (not peak pressure) is directly related to velocity. But apparentlly Hammers don't have the same bearing surface as some other bullets, so their barrel friction loss is likely less. </p><p></p><p>I think reloaders should not use more powder than manual maximum. You are already extrapolating from the test barrel to your barrel. You really have no idea about pressure once you exceed book max; pressure rise isn't proportional to powder charge, especially near SAAMI pressure limits. There just isn't a good payoff for living on the wild side of manual loading data. That many people have and lived to tell the tale doesn't mean the next person will. All for a few extra fps?</p></blockquote><p></p>
[QUOTE="fta0303, post: 3040297, member: 43503"] Pressure signs often don't appear 'til 80,000 to 85,000 psi. If you see pressure signs, chances are you are well over SAAMI cartridge pressure limits. All other factors being equal (like barrel friction or bullet bearing surface), equivalent pressure (not peak pressure) is directly related to velocity. But apparentlly Hammers don't have the same bearing surface as some other bullets, so their barrel friction loss is likely less. I think reloaders should not use more powder than manual maximum. You are already extrapolating from the test barrel to your barrel. You really have no idea about pressure once you exceed book max; pressure rise isn't proportional to powder charge, especially near SAAMI pressure limits. There just isn't a good payoff for living on the wild side of manual loading data. That many people have and lived to tell the tale doesn't mean the next person will. All for a few extra fps? [/QUOTE]
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Why Hammer Bullets Are Always Faster
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