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Rifles, Reloading, Optics, Equipment
Reloading
Pancakes, Craters & Swipes
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<blockquote data-quote="Calvin45" data-source="post: 2923080" data-attributes="member: 109862"><p>As a rule…honestly I'm still amazed "they" even let us do this sort of stuff unregulated, it's all so subjective and guesswork. </p><p></p><p>But I've had factory ammo on more than one occasion give a shiny mark on the case head and pancaked primers are perfectly common. I really don't believe it was running 70+ kpsi but I could be wrong of course. </p><p></p><p>But I agree with your statements overall. The presence of some of the more troubling pressure signs is a clear and definite "NO" to the safety of a load but the absence of them isn't necessarily a clear and definite "YES". More like "probably". </p><p></p><p>Easy bolt lift and relatively normal looking case heads doesn't necessarily mean you're at or under 65kpsi. But stiff bolt lift and pierced or falling-out-loose primers almost certainly means you're WAY over that.</p><p></p><p>That being said, I think the OP load is absolutely fine. </p><p></p><p>Moreover this may be foolish but I've kind of come to a "so what?" place of mind when it comes to whether or not I'm slightly exceeding SAAMI spec pressure IN A MODERN BOLT ACTION RIFLE. lever guns, pumps, "old" bolt guns, semi autos, and anything rear-locking is not in the same category. I almost certainly have and use some loads that are a little "hot". And I honestly feel like so what? If I'm still getting decent brass life regarding primer pockets, checking the fired cases over for excessive stretch both in length and diameter at the web as well as visually inspecting cleaned cases for neck splits and incipient case head separation (which should always be done anyway), the bolt is easily lifted and pulled back with one finger (I always abide by my "one finger rule" when developing loads), and chronographed velocity and calculated energy levels are in keeping with what might be considered the very top end of performance for a given cartridge but not in the "raised eyebrow" territory of what's been previously impossible…well then so what if it's in that 65-75k range?</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2923080, member: 109862"] As a rule…honestly I’m still amazed “they” even let us do this sort of stuff unregulated, it’s all so subjective and guesswork. But I’ve had factory ammo on more than one occasion give a shiny mark on the case head and pancaked primers are perfectly common. I really don’t believe it was running 70+ kpsi but I could be wrong of course. But I agree with your statements overall. The presence of some of the more troubling pressure signs is a clear and definite “NO” to the safety of a load but the absence of them isn’t necessarily a clear and definite “YES”. More like “probably”. Easy bolt lift and relatively normal looking case heads doesn’t necessarily mean you’re at or under 65kpsi. But stiff bolt lift and pierced or falling-out-loose primers almost certainly means you’re WAY over that. That being said, I think the OP load is absolutely fine. Moreover this may be foolish but I’ve kind of come to a “so what?” place of mind when it comes to whether or not I’m slightly exceeding SAAMI spec pressure IN A MODERN BOLT ACTION RIFLE. lever guns, pumps, “old” bolt guns, semi autos, and anything rear-locking is not in the same category. I almost certainly have and use some loads that are a little “hot”. And I honestly feel like so what? If I’m still getting decent brass life regarding primer pockets, checking the fired cases over for excessive stretch both in length and diameter at the web as well as visually inspecting cleaned cases for neck splits and incipient case head separation (which should always be done anyway), the bolt is easily lifted and pulled back with one finger (I always abide by my “one finger rule” when developing loads), and chronographed velocity and calculated energy levels are in keeping with what might be considered the very top end of performance for a given cartridge but not in the “raised eyebrow” territory of what’s been previously impossible…well then so what if it’s in that 65-75k range? [/QUOTE]
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