Quote Originally Posted by 243LPR View Post
As long as you're between min and max length with the finished product does it really matter?
Exactly. When measuring the OAL you still measure it from base of case to case mouth but when trimming you are just using two different points of where to trim from. Doesn't change the OAL in the end. And you can load very accurate ammo doing it either way. Depends if you want to spend a lot of time doing it with a small lathe or if you want to do it quicker with the powered units. If you plan on doing a lot of brass then get the powered units.