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Rifles, Reloading, Optics, Equipment
Reloading
.264 Win Mag Powder Choice?
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<blockquote data-quote="scoutm" data-source="post: 685907" data-attributes="member: 18455"><p>I'm in the final stage of having a .264 Win Mag built and I'm starting the process of choosing where to start with my load development.</p><p> </p><p>I'm limited in my choice of brass - only two manufactures that I can find that are making it so I went with the Nosler. The bullet I selected is the 130 grn Scirocco II for it's high BC and SD.</p><p> </p><p>Now to my gunpowder choice. All my reading leads me to the slower burning powders and I'm leaning toward trying H1000 and Retumbo. There's a but though, I see that Winchester Supreme 780 shows better velocities at lower presures than the two I'm leaning towards....How can that be? Faster powder, lower Max presures with higher velocities. Since the data is all coming from the same site I can only assume the test barrel is the same in terms of length and twist but can't be sure. Any thoughts and/or recommendations?</p><p> </p><p> </p><p>129 GR. HDY SP Retumbo .264" 63.5 3005 51,900 PSI 67.5 3171 61,500 PSI</p><p>129 GR. HDY SP H1000 .264" 60.2 2942 54,500 PSI 64.0 3064 60,700 PSI</p><p>129 GR. HDY SP WinSup780 .264" 63.0 3140 55,000 PSI 67.0 3269 59,500 PSI</p></blockquote><p></p>
[QUOTE="scoutm, post: 685907, member: 18455"] I'm in the final stage of having a .264 Win Mag built and I'm starting the process of choosing where to start with my load development. I'm limited in my choice of brass - only two manufactures that I can find that are making it so I went with the Nosler. The bullet I selected is the 130 grn Scirocco II for it's high BC and SD. Now to my gunpowder choice. All my reading leads me to the slower burning powders and I'm leaning toward trying H1000 and Retumbo. There's a but though, I see that Winchester Supreme 780 shows better velocities at lower presures than the two I'm leaning towards....How can that be? Faster powder, lower Max presures with higher velocities. Since the data is all coming from the same site I can only assume the test barrel is the same in terms of length and twist but can't be sure. Any thoughts and/or recommendations? 129 GR. HDY SP Retumbo .264" 63.5 3005 51,900 PSI 67.5 3171 61,500 PSI 129 GR. HDY SP H1000 .264" 60.2 2942 54,500 PSI 64.0 3064 60,700 PSI 129 GR. HDY SP WinSup780 .264" 63.0 3140 55,000 PSI 67.0 3269 59,500 PSI [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.264 Win Mag Powder Choice?
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