Fever, let me start with this-If your bullets are pushing back in case=YES you have problems==this can cause excessive chamber pressure in any semi-auto load! Start at the size die-is it all the way down against the press ram with all play removed-most die mfg. say 1/8 turn after ram contacts die-unless you are using carbide dies. With carbide dies-just barely touching. Next belling-only bell enough to start the bullet into sized case. Seat to desired OAL. I DO NOT crimp at the same time that I seat the bullet-some do I don't. After you have seated a batch (50-100) of rounds, if you don't have a separate crimp die, un-screw your seater punch/plug, as to not contact seated bullet, screw the die assembly down to contact loaded round-lift up on ram-screw down 1/16-1/8 turn at a time until desired crimp is installed. When proper crimp is done, you will NOT be able to push bullet into case, or turn in case with your fingers. I do not, at this time load .40S&W. I do load 9MM+.45acp. I use Dillon Dies for these loads. For the best overall performance of my loads, I run all of these loads through a Lee Factory Crimp Die when done. This die puts the proper crimp on case mouth, and also the die has a carbide ring at the base of the die that "smooths" up the entire round. I have had NO=0-FTF/FTE of either of these cals. since I started using the Lee Factory Crimp Die-And I am NOT a fan of Lee products!! I know I'm long winded, but it takes longer to type this process than it takes to do. Hope this helps+I'm sure some of the .40S&W loaders will step up to give their 2cents worth..