coupe - what weight Powerbelts were you shooting to have them like throwing rock when compared to a 370 Maxiball? You know you can get them in 223gr?
And with sabots there is a wide assortment of combinations you can use depending on the sabot you select. A few of us have been having excellent accuracy (1 MOA) using saboted bullets. The trick is getting the right 'recipe' for your particular rifle.
But I am not putting down the good old Maxiball. It is a good projectile in its own right and has taken a lot of game. If they shoot well for you that's great.