Originally Posted by jasent
#1. You would have to give us a step by step of your reloading process
#2 sounds like you need to aneal your brass. Your brass has become work hardened and has too much spring back.
#3 I would not mix head stamp/brands of brass
#4 there are a number of ways, tumbling,vibratory cleaners,I polish with flitz brass polish.
My first step is to set up my die. I screw down until it touches the shell holder, then I release the leaver and screw down the die another 1/4 turn. I then tighten the nut and raise the shell holder to check it feels right.
I then lube the casings and a inside of the neck. I wipe off any oil on the outside of the neck so I don't get accidental casing indents from hydrolic pressure. I slowly re size the casing going threw the entire motion of the handle.
I then wash all my brass with a mild dish soap and toss them in the tumbler. After tumbling I use a primer pocket cleaner and clean any burnt powder and make sure primer pocket is clear of any Media.
I use my caliper to check the OAL of the casings and trim if needed. I use a deburing tool on each brass.
I then insert primers into the primer pockets.
I charge each case with an exact measure of powder. I then seat the bullet were it is touching the lans or maybe .001 shy of the lans. I have double checked and I know that my problem is not the bullet hitting the lans, I have tried a shorter COAL and it makes no difference.