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Rifles, Reloading, Optics, Equipment
Reloading
OBT method, barrel length vs velocity
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<blockquote data-quote="Stammster" data-source="post: 1999179" data-attributes="member: 114381"><p>50-55k is ok if your punching paper, and perhaps for a cartridge that's only good for 60k. With the 270 Win, I see some clear external ballistic advantages, especially energy and wind dope at long range by trying to accurately push into the 63-65k range (65k SAAMI rated).</p><p></p><p>FYI, This gun and load is not my long range setup, and in fact I've settled on 59.5 gr for Texas deer and hogs. It shoots continuously less than 1 MOA at 3000 fps. The OBT node recommended at 60.5-61 gr didn't. I also have a good load with 60 gr H4831SC that shoots well at 2970 - 2990 fps.</p><p></p><p>Plus at my normal ranges of 50-200 yds, I didn't want to push these cup and core bullets at too hard of an impact velocity.</p></blockquote><p></p>
[QUOTE="Stammster, post: 1999179, member: 114381"] 50-55k is ok if your punching paper, and perhaps for a cartridge that’s only good for 60k. With the 270 Win, I see some clear external ballistic advantages, especially energy and wind dope at long range by trying to accurately push into the 63-65k range (65k SAAMI rated). FYI, This gun and load is not my long range setup, and in fact I’ve settled on 59.5 gr for Texas deer and hogs. It shoots continuously less than 1 MOA at 3000 fps. The OBT node recommended at 60.5-61 gr didn’t. I also have a good load with 60 gr H4831SC that shoots well at 2970 - 2990 fps. Plus at my normal ranges of 50-200 yds, I didn’t want to push these cup and core bullets at too hard of an impact velocity. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
OBT method, barrel length vs velocity
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