I use a Hornady Case Prep machine.
On average, without really hustling, I can prep about 100 cases per hour. That is trim to length, chamfer inside and outside of neck, case neck brush, flash hole deburr and primer pocket uniform/clean.
I am no bench rest shooter, but this process makes my lowly savage 12 into a 1/2 moa shooter, and that is all I'll ever want.