This is my opinion and experience after many years of case trimming and high volume reloading. Others may disagree and are probably just as right. First a difference of a few 1/1000's between cases will have no decernable effect on SD or ES, assuming the longest case is not longer than the maximum case length, and even then you might get away with a few more 1/1000's depending on your chamber. Campering and deburing are tedious but then so is a lot of case prep we do. Brass shavings are a PITA but respond quickly to the application of a shop vac. My first experience was with the Lee hand held system, and while very cheap it was sooo slow. Adding a power source improved it but not by much. The Little Crow devices are great, quick accurate not super expensive, but still all that brass and campering and deburing still as separate tool changing steps. Then I got one of the Franklin Arsenal machines. About $100 and tricky to set up, not very intuitive but works with most any size case. The brass shavings are semi-contained, but still need to be vacuumed up when done. The power primer pocket cleaner is adequate, the campering piece is at the optimum angle for VLD bullets, and the deburing piece is also adequate. The machine is loud and if you try to force quick trimming on overly long cases you will get chatter but if so back of a little and slow down. I also don't like that primer residue from the cleaning process accumulates on top of the case trimmer. Still while not a Gracey, it handles all of my 308 Win, 6.5CM, and 223 Rem trimming for far less than 3 Gracey's in cost or space.