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Rifles, Reloading, Optics, Equipment
Reloading
Case weight?
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<blockquote data-quote="Tripodmvr7" data-source="post: 2083741" data-attributes="member: 115545"><p>I copied this from that link. PV=nRT is the formula for ideal gases, but it would apply here as well. You would need the full volume where the reaction takes place = fire formed case.</p><p></p><p><strong>2. Always measure ACTUAL case capacity.</strong> If your cartridge capacity is less than QuickLOAD assumes, you can get pressure problems with loads identified as safe. Remember different brands of brass may vary in case capacity by up to three grains (with the larger cartridges). Don't even think of applying QuickLOAD-generated recipes until you've measured the ACTUAL case capacity of your brass. Montana Marine concurs: "The biggest tip I would give is to measure the water capacity of your fire-formed cases, and enter that data into the equation. Before doing that, my chrono'd velocities were typically 20-40 fps slower than calculated. After entering in actual water capacity, results are generally within 10 fps of calculations. For example, the default water capacity of the 30-06 is 68.2gr. My fire-formed Remington cases hold 70.5gr, fire-formed Norma cases hold 73.7gr. That is a significant difference."</p></blockquote><p></p>
[QUOTE="Tripodmvr7, post: 2083741, member: 115545"] I copied this from that link. PV=nRT is the formula for ideal gases, but it would apply here as well. You would need the full volume where the reaction takes place = fire formed case. [B]2. Always measure ACTUAL case capacity.[/B] If your cartridge capacity is less than QuickLOAD assumes, you can get pressure problems with loads identified as safe. Remember different brands of brass may vary in case capacity by up to three grains (with the larger cartridges). Don’t even think of applying QuickLOAD-generated recipes until you’ve measured the ACTUAL case capacity of your brass. Montana Marine concurs: “The biggest tip I would give is to measure the water capacity of your fire-formed cases, and enter that data into the equation. Before doing that, my chrono’d velocities were typically 20-40 fps slower than calculated. After entering in actual water capacity, results are generally within 10 fps of calculations. For example, the default water capacity of the 30-06 is 68.2gr. My fire-formed Remington cases hold 70.5gr, fire-formed Norma cases hold 73.7gr. That is a significant difference.” [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case weight?
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