This is getting very interesting, I think you will find that a boat tail bullet and and a straight shanked bullet will spin at exactly the same speed, the amount of bearing surface will make no difference to the spin rate. The reason for the introduction of A-max and Vmax was to change the shape, the longer bullet giving greater accuracy.
So I think that the bearing surface will make no difference as the spin imparted will be the same, but the A-max, having the same mass but a different shape (longer) will provide greater accuracy, all of this of course in theory. I say this as I have known two of the same rifle shoot 105 grain bullets differently one no good the other good.
A .243 100gr bullet that is accurate in your gun, zeroed to give a point blank range of 3-4 inches around the 200 yard mark, just like swampy said, makes a very capable rifle IMHO.
John