I was a little wrong in my post the 105 and 107 Nosler Custom Competition bullets are recommended for a 1:8 twist. However, you have to shoot them in your rifle to see if they'll stabilize. As I'm not sure that the recommendation isn't for cartridges like the 6 PPC and BR with smaller case capacity and slower velocities where as the .243 might be able to get enough velocity to stabilize the bullet in a 1:9.25 twist.
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