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6.5 Grendel upper
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<blockquote data-quote="CA48" data-source="post: 1421108" data-attributes="member: 21446"><p>Alexander arms makes a 7.5 twist. </p><p></p><p>The grendal was designed around the 120gr bullets. A 9 twist will stabilize the 120 class bullets even at sea level. If you want to run the 140s you will need a 8 twist or faster.</p><p></p><p> I've put 6.5 bullets in pigs with 140gr a max at 2700 fps mv and 140 Berger Vld-H at 3150fps mv. Both worked well even with impact velocitys as low as 2200fps.</p></blockquote><p></p>
[QUOTE="CA48, post: 1421108, member: 21446"] Alexander arms makes a 7.5 twist. The grendal was designed around the 120gr bullets. A 9 twist will stabilize the 120 class bullets even at sea level. If you want to run the 140s you will need a 8 twist or faster. I've put 6.5 bullets in pigs with 140gr a max at 2700 fps mv and 140 Berger Vld-H at 3150fps mv. Both worked well even with impact velocitys as low as 2200fps. [/QUOTE]
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