If it factory ammo youre talking about, the federal gold medal match is hard to beat in either 155, 168 or 175 SMK.
If it is hand loads youre looking for, VARGET, 4064, BENCHMARK and RL-15 are sure bets for powder, 175 SMK, 178 AMAX, 190 SMK are also very good match quality bullets well suited for your twist.