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The Range
Rifle & Shotgun Discussion
Which .223 Rifle?
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<blockquote data-quote="CAR-AR-M16" data-source="post: 900981" data-attributes="member: 204"><p>You need a faster twist for a heavier/longer bullet to stabilize it. 9" is good for the 60gr and above, 12" is good for less than 60gr. The military used a 12" twist in the M16 and M16A1 shooting M193 55gr ammo. The current M16A2 and M4 have a 7" twist for the M855 62gr ammo. 7" is a liitle much for the M855, but they went with it to stabilize the long M856 Tracer round that is used.</p></blockquote><p></p>
[QUOTE="CAR-AR-M16, post: 900981, member: 204"] You need a faster twist for a heavier/longer bullet to stabilize it. 9" is good for the 60gr and above, 12" is good for less than 60gr. The military used a 12" twist in the M16 and M16A1 shooting M193 55gr ammo. The current M16A2 and M4 have a 7" twist for the M855 62gr ammo. 7" is a liitle much for the M855, but they went with it to stabilize the long M856 Tracer round that is used. [/QUOTE]
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