nifty, that is exactly what I'm asking/concerned about. I like to get all the accuracy I can but am not interested in blowing up my rifle for 1/8" better groups.

One other question I have - Is a bullet comparator the way to go or is measuring OAL with a good un-marred bullet good enough?

A true sportsman counts his achievements in proportion to the effort involved and fairness of the sport. - S. Pope