[amamnn]

For factory rifles this is a tempest in a teapot.

If you want to ensure true uniformity of your cartridges for a match rifle then you should first cull cases based on the actual capacity. This assumes you have sized and trimmed them all to the same body diameter, shoulder to base length and neck trim length also called trim length, not overall length.

Then you must cull bullets, first by weight, then by the base to ogive length. I like the Sinclair bullet comparator for this as, they say it is actually reamed with the same type reamer used in making custom chambers, rather than just drilled and chamfered to an arbitrary measurement like the Hornady (formerly Stoney Point) tool. At this point, if you are shooting at 300 yards or so, you might trim the meplat to ensure uniform ballistic coefficients of all bullets. Using a comparator to only check the COAL without doing the above is like changing your car's oil and not the filter.

By doing all this you ensure that you have produced a uniform cartridge both inside and out. Did I forget to mention checking concentricity? Well, no matter. That's another subject.