Stuff like that is why I adjust seating dies every time I use them. When doing so I also use a comparator and seat to a head to ogive standard. Unless it takes me out of bounds for fitting into the magazine I'm not concerned at all about overall cartridge length.
This weekend I cracked open a new 500 count box of Hornady 168 grain bthp match bullets. Seated then per my usual procedure and lo and behold, the overall cartridge length was twenty thou over that for the previous lot number. Immaterial since base to ogive was right and they shot as well and to the same POI as always.
