It is possible to get that perfectly cut, but it is difficult. Like others have said, slow the cut WAY down. The proverbial "if the frog is at one end of the log and jumps 1/2 the way to the end of the log, can it ever get to the end of the log?' Kind of the same thing here with feet/minute, is the dead center actually moving at all??? If it is end grain, then a NRS can work very well. Leaving a small nipple works great.
robo hippy