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I think a good example might be my Remington Classic in 6.5x55. It has a 1 in 9" barrel twist and shoot the Sierra 160gr. Semi-Pointed bullet very accurately. Yet it's a real bummer with the Sierra 140 and 142gr, Spitzers. The lighter bullets in this instance are much longer than the heavier less pointed ones. Yet the 140gr bullets do much better in my older M96 Swedish mausers which have a 1 in 7 1/2" twist so weight isn't everything in determining what will shoot well. Bullet configuration plays a part also. Best wishes.
Cal - Montreal
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