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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.257, 6.5mm and 270 Allen Mags, New Family or Rounds...
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<blockquote data-quote="Fiftydriver" data-source="post: 36727" data-attributes="member: 10"><p>Len,</p><p></p><p>I am predictiong the 257 AM will use around 87 to 89 gr of Retumbo under the 130 gr BCFBHP.</p><p></p><p>For the 145 gr pill I would say that the top load would be in the 82-84 gr level with the same powder.</p><p></p><p>The 150 gr bullets will probably around 78-80 gr of Retumbo and probably around 88 gr of H-50BMG but these are just guesses as I have yet to test the 145 and 150 gr bullets for any solid data. </p><p></p><p>Will be soon.</p><p></p><p>When I say relatively low recoil, let me state that I am saying compared to other rounds that will deliever this level of penetration and trajectory. This would be at the level starting with the 7mm RUM with 160 gr bullets and up to the likes of the 30-378 and 338-378 depending on bullets used. </p><p></p><p>Good Shooting!!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 36727, member: 10"] Len, I am predictiong the 257 AM will use around 87 to 89 gr of Retumbo under the 130 gr BCFBHP. For the 145 gr pill I would say that the top load would be in the 82-84 gr level with the same powder. The 150 gr bullets will probably around 78-80 gr of Retumbo and probably around 88 gr of H-50BMG but these are just guesses as I have yet to test the 145 and 150 gr bullets for any solid data. Will be soon. When I say relatively low recoil, let me state that I am saying compared to other rounds that will deliever this level of penetration and trajectory. This would be at the level starting with the 7mm RUM with 160 gr bullets and up to the likes of the 30-378 and 338-378 depending on bullets used. Good Shooting!!! Kirby Allen(50) [/QUOTE]
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.257, 6.5mm and 270 Allen Mags, New Family or Rounds...
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