Sounds like I might need to buy some H110. MCB, that is interesting how the light 148 WC's group the in the same area as the hotter 180's. I read that one of the primary causes of lighter loads printing higher is the fact that they are in the barrel longer as the gun is recoiling and the muzzle is arcing upward. I'd imagine that the 180, due to inertia, would have a faster arc - matching the effect of the lighter load being in the tube longer during a slower arc. Any physicists out there?