Keith - I'm not knocking the persuit of perfection. As you state, there are different valid approaches to Reloading and not every minor variable effects accuracy at the target. Keeping it fun is important.

One old extra-step I use: 1. Start the bullet slightly into the case-mouth with the Seating Die. 2. Back-off the Die and rotate the case about 90 degrees in the shell-holder. Seat the projectile to about half its seating depth. 3. Back-off the Seating-Die pressure. Rotate the case another 90 degrees and then complete the bullet seating stroke.

I do this quickly & automatically, and it improves bullet concentricity with the cartridge case.