The US-Military did tests back-in-the-day, with 7.62 nato, a bunch of other calibers, and 6.5x55. They fired into compressed-damp sand. I dont know the range, but the 6.5x55 won the penetration-test and out-penetrated the 308 by 9" !.. And that is why 120gr is more than enough for any Deer, in 6.5cal...the rest go straight-through unless they hit something substantial, and at very long-range, they can sometimes be too slow, to expand properly
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