big country i know you know I'm a novice at this bottle kneck cartridge loading stuff,
But ive been using a Lee neck sizing collet die its been working great I have my 308 load all worked out now including my seating depth I'm so happy with at 200 yards 5 shots look like one ragged hole. I have been loading the same 20 casings over and over 5 times now to see what kind of life they are looking at. ive figured out with the collet neck sizer die if i give it another 1/4 turn it resizes the shoulders enough to feed smoothly in my gun. I know most of lees junk is junk but im begining to really like their collet die. I worked the load up to 46 grains of varget then backed it off to 45.5 grains with a COL of 2.780 the load chronographed at 2722 fps. LOL i'm giving you advice, but i say stick with the neck sizers if the brass gets to out of whack just full length size them and start over or if you have other fire formed brass use them and put the others aside, thats what I would do.