Good call, Steve.
I was goning to mention that doesn't matter to what level you'll do your "precision loading," consistent case length matters a bunch when doing any crimping operation as it all "indexes" off the length of your case = varying case length = varying crimp (which can cause a combustion, accuracy difficulty).
A main variable we see in reloading is inconsistency of components. The whole idea is to make each & every reload the same, so we can throw out that one variable that doesn't give us our perfect load.
If a crimp is important to a heavy magnum straight-wall pistol case, why wouldn't one make sure that all cases are the same length? Same-same goes for seating depth in a bottle-neck rifle cartridge, no?
Consistency's the game for really decent load development.
(& this from someone who really could care about most things pistol cases ... but, I've learned a lesson or two when I want 'em to go where I want .... )