So then I've decided on a bullet that I want to use for what I intend to use it for . As I reload and use a bolt action most of the time I do things to my brass that most people don't . I studied what the B R guys do and thinking that I want to get the most out of my rifle I would do a lot of the things they do as it couldn't hurt with accuracy . I buy new brass cut the primmer pockets to a standard depth and diameter , de burr the flash holes inside the case and check the length of them size weigh them and sort them out if they vary by much in weight and load them . I will seat the bullets to a depth that gives me some freedom from the lands and start my load development with a lower then max load by a few thousands of a grain and load 5 rounds at that then a few rounds at half a grain more till I get near max and go shoot them checking my pressure as I go by inspecting the spent brass after each shot as well as seeing how accurate they are grouping . When I've found a charge weight that groups well I will refine that charge by a 10th of a grain till I get a group that is tighter then the rest . now I go to figuring the seating depth that my rifle likes the best from touching the lands to .060 off the lands to see what it likes I have some that like .120 off the lands but my 223's usually like .062 as does my 30-06 . My 223 Winchester likes the Sierra bullets but not any hornady bullets I've tried or barns ,burgers but will do well with some of the nosler bullets . Now that I've fire formed the brass to my chamber by firing them at least 3 times I will set my dies to do more then just neck size the brass and will push the shoulders back by .002 and then trim them all to the same length . I'm a fan of the lee precision case trimmers made for the case that I'm shooting they don't cost a lot and are easy to use and get the same length every time . I believe in de-burring the mouth of the case so that I don't have any burrs inside or out side of the case and don't cut any copper from the bullet . I weigh every charge , every bullet and each piece of brass , depending on the chambering the amount of case weight variance that I allow changes .