The Barnes 6mm TTSX is 80gr. I havent tested them personally as the copper bullets are quite long and wont stabilize in my slower 1-14" twist. However I can load both the 80gr sp and 85gr HPBT to just over 3000fps with a hot load and they both stabilize in my barrel as they are shorter bullets. Personally I favour the Sierra 75gr flat base hollow points though. They shoot great at 3000fps with a more modest load.
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