If it's tight at 55 go back one castle slot, if that is 1/6 that's great, but one slot only. The initial 55 lbs is to seat and preload the bearing and should feel tight. (slight drag) If 55 is not tight, then just tighten until "tight" while spinning. (tight means slight drag when spinning). You must test wheel/tire OFF the ground.
It should be able to spin a few times with a hard push. It will loosen up anyway in a few miles. Recheck spin later. It should only move a very small amount. We are talking .005. You would barley feel it. You would not feel it with tires on the ground. If you have a lot of movement, it's not the bearings assuming you are sure they are not worn out, it's joints, steering parts or king pins or .....worse
Roller bearings may have a different torque value than ball. You did not say if you examined cones, cups and spindles carefully for excessive wear.
