I use 150 grn TTSX in 300 SAUM at 3150 and it just smashes them. Longest shot has been 300 yards and there was a hell of an exit so it expanded ok. Is not very often I shoot beyond 350 or so. But they are still going 1800 fps at about 650 so with me if I ever need to I would use them at 450-500 no problems. Would aim to hit a bit of bone though to ensure they expand.
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