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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
223 wssm
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<blockquote data-quote="J E Custom" data-source="post: 287901" data-attributes="member: 2736"><p>Good question.</p><p></p><p>I am in the middle of an experiment using the 223 WSSM .</p><p></p><p>My goal was to exceed 4400 ft/sec so the twist I chose was a 1 in 15.</p><p></p><p>The 223 WSSM should push the 70 gr bullet around 3500 ft/sec so I would think</p><p>a 1 in 10 would be about right.</p><p></p><p>But if you go to a fast twist you may have trouble with lighter bullets over rotating.</p><p></p><p>Kirby did a lot of testing with heaver bullets and should be able to shed some light</p><p>on your question.</p><p></p><p>So far the 1 in 15 has worked well with up to 64 gr bullets @ 3922 ft/sec and a SD </p><p>of 06, The 40 gr Ballistic Tip has reached 4318 ft/sec with no pressure signs and </p><p>accuracy is under 1/2 MOA (I hope it will end up better than that).</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 287901, member: 2736"] Good question. I am in the middle of an experiment using the 223 WSSM . My goal was to exceed 4400 ft/sec so the twist I chose was a 1 in 15. The 223 WSSM should push the 70 gr bullet around 3500 ft/sec so I would think a 1 in 10 would be about right. But if you go to a fast twist you may have trouble with lighter bullets over rotating. Kirby did a lot of testing with heaver bullets and should be able to shed some light on your question. So far the 1 in 15 has worked well with up to 64 gr bullets @ 3922 ft/sec and a SD of 06, The 40 gr Ballistic Tip has reached 4318 ft/sec with no pressure signs and accuracy is under 1/2 MOA (I hope it will end up better than that). J E CUSTOM [/QUOTE]
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223 wssm
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