There's a bunch of different bullets that should work with that turret. 180 Swift Scirrocos, 180 Ballistic Tips, 180 Sierra SBTs, 190 Bergers, etc. I can't imagine the 180 Accubond not shooting well enough for you. Like I told both you guys... my Sendero 300 RUM only shoots MOA at 100... but it will hold MOA (and often better) for a loooong ways, and 8" groups at 800 yards will still hammer a coyote.
How "inaccurate" are your 180 loads?
What powders are you guys shooting?
Have you fooled around with the OAL?
Have you tried Moly (I know Jamie is a fan of the Moly coated 200 Accubonds in his RUM)?