1. trim all cases to the same length
2. uniform primer pockets so as to allow proper seating of primers.
3. uniform primer pocket flasholes to remove any burrs left by the drilling of flasholes.
4. weigh or throw powder charges
If you really wanna get picky weigh all your cases across a bell curve to eliminate both the lightest and heaviest cases.
5.Bell the cases slightly so as to allow seating of bullets and to avoid scratching/scraping of the bullet.
6. Use handheld primer tool,rotate case 180 degrees after primer is initially seated in primer pocket then finish seating primer. Some shooters feel that doing it this way you can feel the primer when it seats and maintain better control over primer seating pressure.
7. Seat bullet using one of reddings micrometer seating die. in other words the exact same length of bullet is seated out of the case neck.
8.in certain cases neck turning may be required. Turn the outside of the neck.
9. Wilson makes a seater that can be adjusted to give you your seating depth. small circular base upon which the die itself rests,seat bullet loosly in the case neck then push on plunger to seat the bullet. Bench rest shooters do this. This is a step that you depending how well your rifle is shooting using the redding seating die.
10, when making changes no matter what they be only change one thing at a time and keep accurate records. I use steno pads for this.
The rest is up to you the shooter. Hope some of this helps. Frank