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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 Sherman Shortmag (SS)
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<blockquote data-quote="Idaho Trecker" data-source="post: 1127932" data-attributes="member: 67706"><p>It's actually the other way around... the sherman short (saum parent) has 2 or 4 grains less capacity than the Sherman (270 win parent) my Sherman has a 27" and the SS a 24". The only powder I've shot in both so far is rl 33 and with a compressed load in the ss it only holds 67.6 grains whereas with the long throated Sherman I can pack in 74 grains. It looks like I was able to hit 3156 with the sherman and 2827. It seems like you gain around 50 fps per grain of 33 and the math works out with the charge and barrel length difference so that the 50 fps seems true.</p><p>I'll be trying rl 26 next and bet I will max out speed with that faster than any other (I got 3200 fps in Sherman with rl 26).</p></blockquote><p></p>
[QUOTE="Idaho Trecker, post: 1127932, member: 67706"] It's actually the other way around... the sherman short (saum parent) has 2 or 4 grains less capacity than the Sherman (270 win parent) my Sherman has a 27" and the SS a 24". The only powder I've shot in both so far is rl 33 and with a compressed load in the ss it only holds 67.6 grains whereas with the long throated Sherman I can pack in 74 grains. It looks like I was able to hit 3156 with the sherman and 2827. It seems like you gain around 50 fps per grain of 33 and the math works out with the charge and barrel length difference so that the 50 fps seems true. I'll be trying rl 26 next and bet I will max out speed with that faster than any other (I got 3200 fps in Sherman with rl 26). [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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270 Sherman Shortmag (SS)
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