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Posted: 10/16/2009 8:18:55 AM EDT
TGIF 
I was looking at Sig website and saw the Sig556 DMR When I raed the spec they listed the twist rate as 1:10 From sig web page: Features a 21”military grade cold hammer-forged heavy contour barrel. The rifle is chambered in 5.56mm NATO, with a twist rate of 1 in 10” . The match grade heavy barrel features a target crown and matte black nitride finish for the ultimate in corrosion resistance. The forearm, housing the gas operating system, is a vented non-slip polymer featuring the SIG TriRail™ design with three integrated Picatinny rails for mounting a bipod and other accessories. The Picatinny rail equipped receiver is made of high strength steel with a durable wear-resistant Nitron-X finish. The trigger housing is machined from an aircraft grade aluminum alloy forging with a hard-coat anodized finish designed to survive extreme conditions. The rifle comes equipped with an enhanced single stage target trigger, ambidextrous safety and is designed to accept standard AR magazines. The ergonomically designed pistol grip features an integrated storage compartment. What the hech? 1:10 that would stablize 40 to 60 grain rounds Is this a mistake? Spud47 |
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It may very well be a mistake. When Sig first listed the 522, they showed a 1:7 twist rate, which I thought was odd for a dedicated .22lr. After an e-mail exchange with a Sig LEO rep, they corrected it to 1:16. But I don't know enough about .223 twist rates. Wasn't the original M16 a 1:12? |
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