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Rifles, Reloading, Optics, Equipment
7mm STW
Thinking of building a 7 stw
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<blockquote data-quote="chuckhammer" data-source="post: 1097286" data-attributes="member: 25816"><p>I designed and built an improved 7-300 Win Mag wildcat that I call 7mm Valkyrie. It has a similar case capacity to 7STW at 93 grains H20 with WW Super brass. The rifle is built on a Savage 110 and has a 28" Criterion Match tube. The WW Super brass is quite strong. Using Reloader 33 I can get 3250 fps from 180 Hybrids for multiple loadings. I've hit 3300 but extractor marks begin to show up consistently.</p><p></p><p>Since 7STW Rem headstamp brass has similar capacity (95 gr H2O) and strength (I understand it's a bit softer) I would think you could match the above numbers using RL33 and a 28" tube.</p><p></p><p>Retumbo, H1000, and 7828 just don't have the energy density and slow burn rate to optimize velocities as well as RL33 for 180s in the big cases.</p></blockquote><p></p>
[QUOTE="chuckhammer, post: 1097286, member: 25816"] I designed and built an improved 7-300 Win Mag wildcat that I call 7mm Valkyrie. It has a similar case capacity to 7STW at 93 grains H20 with WW Super brass. The rifle is built on a Savage 110 and has a 28" Criterion Match tube. The WW Super brass is quite strong. Using Reloader 33 I can get 3250 fps from 180 Hybrids for multiple loadings. I've hit 3300 but extractor marks begin to show up consistently. Since 7STW Rem headstamp brass has similar capacity (95 gr H2O) and strength (I understand it's a bit softer) I would think you could match the above numbers using RL33 and a 28" tube. Retumbo, H1000, and 7828 just don't have the energy density and slow burn rate to optimize velocities as well as RL33 for 180s in the big cases. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Thinking of building a 7 stw
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