The 3006 standard twist is 1:10 and the 308 1:12 the 06 can handle 250 grain projectiles and they are still loaded for big game overseas. Yet both seem best with the 150 to 175 grain range.
People get twisted over twist rate but the standard twist does 99.9% of everything.
Also it's projectile speed and length more than weight that determines if it will stableise or not.
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