I size all my rifle cases and Lee has a nice inexpensive case specific trimmer and it only takes a few minutes to do a bunch. It has individual shafts for each caliber and it brings every case down to the exact factory set length you need. You can get it for use with a drill also and its called a Lee Case trimmer and each caliber rod is around 3-4 bucks and the cutter head is around 6 dollars. You only need the the one cutter head and a length gauge rod for each caliber you use.
