Quote:1.Bullet
2.Powder
3.Seating depth
4.primers
5.Brass Prep....I would stay with the same priority...
Your barrel will dictate the bullet preference with the powder charge right behind it...
Seating depth effects can show up with good groups, both seated near the lands or away from them, I've had both with the same rifle, but magazine length dictated whether I would shoot as single loading or semi-auto loading..
I have two rounds/calibers that the accuracy is really improved if I use Magnum primers over Standard primers...
My brass prep is all kept within the same parameters for consistency, regardless of caliber...While I may use neck sizing for a specific rifle, initially, each piece of brass is prepped the same way...