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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
8x57mm cartridge
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<blockquote data-quote="Kevin Thomas" data-source="post: 386366" data-attributes="member: 15748"><p>264Junkie,</p><p> </p><p>Found some references to the 8x57 JRS, or IRS. The "S" denotes "spitzer" the then new, lighter weight (154 grain) .323" bullets, and the "I" or "J" stands for "Infantrie" or "Jaeger", the German word for Hunter, which is how they frequently refer to their infantry. The "R" does indeed appear to indicate a rimmed cartridge, especially in light of the fact that you're dealing with an over/under. I have data for both, and it's listed in the Lapua/Vihtavuori manuals. There is a dsitinctly different pressure level between the two, and the data is not interchangeable. Drop me a private message if you need anything more here so we won't clutter up Jamie's original thread.</p><p> </p><p>Hope that helps.</p><p> </p><p>Kevin Thomas</p><p>Lapua USA</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 386366, member: 15748"] 264Junkie, Found some references to the 8x57 JRS, or IRS. The "S" denotes "spitzer" the then new, lighter weight (154 grain) .323" bullets, and the "I" or "J" stands for "Infantrie" or "Jaeger", the German word for Hunter, which is how they frequently refer to their infantry. The "R" does indeed appear to indicate a rimmed cartridge, especially in light of the fact that you're dealing with an over/under. I have data for both, and it's listed in the Lapua/Vihtavuori manuals. There is a dsitinctly different pressure level between the two, and the data is not interchangeable. Drop me a private message if you need anything more here so we won't clutter up Jamie's original thread. Hope that helps. Kevin Thomas Lapua USA [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
8x57mm cartridge
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