130, 140 and 147s all should stabilize. A 260 and a 6.5 creed are basically ballistic twins, and lots of people are shooting those weights in 8 twist creedmoors.
My buddy primarily shoots the 130s in his 8 twist 260. His is a 20" Tikka CTR, so he has found it needs the extra velocity to get best results. YMMV
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