In my .25-06 I had a 1:8 twist not to shoot really heavy bullets but to shoot Barnes TTSX bullets better. In my experience I have gotten good accuracy with the Barnes bullets with the normal twist but when I experimented with the 1:8 twist the accuracy was excellent. This has been my finding with the .257 Weatherby Mag too. I widened my experiment to my new .22-250 and 6mm Remington, the slightly faster twist gave me better accuracy. The better accuracy is not heads and tails but from .75-1.0” to .25-.50. It just gives me more satisfaction and confidence, although I know the improvement means nothing in a hunting application. I did find that the 1:8 twist gave me more options for a wider spectrum of accurate powders as compared to the standard twists. Just my observations yours may differ.
Those are solid points
