Go back and read my post on the batch of 6.5 Nosler BTs where about half of the box measured .570" and the rest between . 583"-.586" ogive to heel like so....


You can't measure from the base, they can vary as much as the tips at times. You may also notice I make my own inserts or steel sleeve the aluminum ones, both bored .002" under the shank diameter. I check the lengths of the cartridges the same way.


The insert on the casehead is bored exactly .100" deep and square. It eliminates any casehead runout in the measurement and insures a consistent placement in the calipers without twisting and turning and adjusting to get the number I want to see.

Bill