Take your pick. I have used IMR-4350, Big Game, RL-15 and Varget. I'm sure others will work but I know for sure any of those 4 work well.
One of the beautiful things about the 7-08 is that a variety of powders work great. Along with those you've listed, I've also made very accurate hunting loads with RL16, H414, and H4350. Any powder that accurately delivers a 140gr Accubond/partition at 2800fps, or 120 ballistic tip at 3000fps will kickasss in the field. Anymore for me, I've whittled mine down to Varget and Big Game
in that order.
