Hello, Here is my current set up for the Glock 20 (Gen 3, kkm barrel), Load (10mm): Starline Brass 180gr Montana Gold Bullet (FMJ) 12.5gr Accu No. 9 WLP Primers Reloading (all done w/ Lee's): 1) Re-size, Deprime (Decap) 2) Bulge Buster 3) Prime (Hand Primer) 4) Flare and Charge 5) Seat (no crimp) 6) Crimp (Lee FCD) My COL is ~ 1.255" (range 1.250-1.260") My cartridge diameter is ~ 0.422" (range 0.419-0.423") My question...Will running the resizing die and the bulge buster work harden the brass, particularly near the case head? Do you all find that the bulge buster is necessary? I don't see "noticeable" bulges on my brass. I am running this die more as a full length resize so my brass will chamber properly. Thank you in advance for your reply! Wanna kill these ads? We can help!