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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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<blockquote data-quote="chuckhammer" data-source="post: 903904" data-attributes="member: 25816"><p>I ran a QuickLOAD calculation using the numbers I have for 7x300 case capacity in W-W Super brass (89 gr H2O). With a COL of 3.500" using a Berger 180 Hybrid I show a starting load of around 69.0 gr IMR 7828SSC for 55k psi and a max load of 73.0 gr for 65k psi.</p><p></p><p>For comparison with a 28" barrel, you end up with the same 3230 fps and 65k psi max pressure with either a 73 gr max load of 7828SSC or a 78 gr of max load of H1000. Difference is about 105% case fill with H1000 vs. 95% fill with 7828SSC.</p><p></p><p>This is according to QuickLOAD. Reality will be slightly different.</p></blockquote><p></p>
[QUOTE="chuckhammer, post: 903904, member: 25816"] I ran a QuickLOAD calculation using the numbers I have for 7x300 case capacity in W-W Super brass (89 gr H2O). With a COL of 3.500" using a Berger 180 Hybrid I show a starting load of around 69.0 gr IMR 7828SSC for 55k psi and a max load of 73.0 gr for 65k psi. For comparison with a 28" barrel, you end up with the same 3230 fps and 65k psi max pressure with either a 73 gr max load of 7828SSC or a 78 gr of max load of H1000. Difference is about 105% case fill with H1000 vs. 95% fill with 7828SSC. This is according to QuickLOAD. Reality will be slightly different. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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