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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The Amazing 270 Win - revisited
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<blockquote data-quote="royinidaho" data-source="post: 794681" data-attributes="member: 2011"><p>Back in the day with the original Oelher chrono w/paper screens the ol' girl did 3190 w/N205 & 4350 w/a 24" Douglas bbl.</p><p></p><p>Since my earlier posts I discovered PP 4000 MR. Study said its similar to 7828. Learned, Not So. 55.5 br 4000 gave same velocity as 57 gr 7828ssc but with way better accuracy.</p><p></p><p>The cheap chrony said 3225 FPS w/low ES.</p><p></p><p>If it'd quit snowing I'd do the drops out to 900 and validate the velocity. I'm fairly confident it won't work out to 3200+ </p><p></p><p>7828 groups at 200 are around 0.75 MOA, well under MOA.</p><p>4000 groups are about half of that.</p><p></p><p>Using CCI 200 primers.</p></blockquote><p></p>
[QUOTE="royinidaho, post: 794681, member: 2011"] Back in the day with the original Oelher chrono w/paper screens the ol' girl did 3190 w/N205 & 4350 w/a 24" Douglas bbl. Since my earlier posts I discovered PP 4000 MR. Study said its similar to 7828. Learned, Not So. 55.5 br 4000 gave same velocity as 57 gr 7828ssc but with way better accuracy. The cheap chrony said 3225 FPS w/low ES. If it'd quit snowing I'd do the drops out to 900 and validate the velocity. I'm fairly confident it won't work out to 3200+ 7828 groups at 200 are around 0.75 MOA, well under MOA. 4000 groups are about half of that. Using CCI 200 primers. [/QUOTE]
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The Amazing 270 Win - revisited
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