Depends on barrel length vs. rate-of-twist. If your .308's barrel is 20" or less, then a 1-in-10" twist is better. If your barrel length is 22" or longer then a 1-in-12" twist is okay.
Question regarding "over-stabilization" and twist ratios...
Kind of a technical question, but...
I understand that a barrel has to have a sufficient twist ratio in order to stabilize bullets in flight. Other than a bullet coming apart and fragmenting mid-flight, how is a bullet "over-stabilized".
Example... Let’s say one 308W bullet stabilized with a 1-10 Twist, and another is stabilized with a 1-12 twist. Why would it hurt stabilization and accuracy if you lowered the twist of both rounds as long as they don’t fragment mid-flight?
My understanding is that different gr bullets need different twist ratios due to their length. And it makes sense. But it doesn’t make sense that a bullet spinning too fast can be less accurate. (As long as it doesn’t come apart)
I understand that a barrel has to have a sufficient twist ratio in order to stabilize bullets in flight. Other than a bullet coming apart and fragmenting mid-flight, how is a bullet "over-stabilized".
Example... Let’s say one 308W bullet stabilized with a 1-10 Twist, and another is stabilized with a 1-12 twist. Why would it hurt stabilization and accuracy if you lowered the twist of both rounds as long as they don’t fragment mid-flight?
My understanding is that different gr bullets need different twist ratios due to their length. And it makes sense. But it doesn’t make sense that a bullet spinning too fast can be less accurate. (As long as it doesn’t come apart)
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One fact, I am certain of, is if one uses 55 grain bullets in a slow twist .22 Caliber HP rifle with a 1-in-16" twist, the accuracy & stability will not be as good as if fired from a 1-in-14" or 12" twist. The velocity must be high enought for the bullet to develop enough momentum to stabolize the heavier bullet.
1 - 2 of 39 Posts
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