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Rifles, Reloading, Optics, Equipment
Reloading
Anybody reload at the range?
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<blockquote data-quote="QuietTexan" data-source="post: 2516392" data-attributes="member: 116181"><p>Not if your nodes are wide enough, your testing fine enough to find the edges of them, and you take enough shots to have inferential results.</p><p></p><p>Doing the big coarse seating test jumps can be enough to significantly change case capacity, but IMO a 0.002"-0.020" fine tuning range shouldn't push you out of the velocity node. If it does you're in a marginal node and probably should use a different powder.</p><p></p><p></p><p>I was in a rush to finalize a load last summer - 100*f+ temps and needed to get it done in very few range trips (I only had three days on the calendar to work with), so I came up with a grid method to give me some hard data to back up where I landed in my initial seating depth and pressure ladder. Shot 0.003" longer and shorter, and .2gn higher and lower powder charge, said all of them should shoot pretty much the same if I'm in a good, resilient place. They all shot about the same, and I took the final "middle" load to 1200 yards the next day. My 10-shot SD/ES was something like 11/35, not something to make the math wizards happy, but it printed well on target.</p><p></p><p>Something like this:</p><p>[ATTACH=full]361409[/ATTACH]</p><p></p><p>If one row or corner had sucked really bad I could have moved left/right or up/down in the grid and at least not been totally guessing about what the results would be since I had at least a group of 5 at each setting combination, on top of the initial pressure/seating depth work ups.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2516392, member: 116181"] Not if your nodes are wide enough, your testing fine enough to find the edges of them, and you take enough shots to have inferential results. Doing the big coarse seating test jumps can be enough to significantly change case capacity, but IMO a 0.002"-0.020" fine tuning range shouldn't push you out of the velocity node. If it does you're in a marginal node and probably should use a different powder. I was in a rush to finalize a load last summer - 100*f+ temps and needed to get it done in very few range trips (I only had three days on the calendar to work with), so I came up with a grid method to give me some hard data to back up where I landed in my initial seating depth and pressure ladder. Shot 0.003" longer and shorter, and .2gn higher and lower powder charge, said all of them should shoot pretty much the same if I'm in a good, resilient place. They all shot about the same, and I took the final "middle" load to 1200 yards the next day. My 10-shot SD/ES was something like 11/35, not something to make the math wizards happy, but it printed well on target. Something like this: [ATTACH type="full" alt="1651030521829.png"]361409[/ATTACH] If one row or corner had sucked really bad I could have moved left/right or up/down in the grid and at least not been totally guessing about what the results would be since I had at least a group of 5 at each setting combination, on top of the initial pressure/seating depth work ups. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Anybody reload at the range?
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