The bulge is very common with both the .40 and 10mm, really isn't an issue if they chamber fine. However, Lee has a fix for it. It is called the bulge buster, actually you can rig one up yourself if you have a Lee factory crimp die. For their kit, you unscrew the top of the Lee factory crimp die and leave the top open, then you thread in their bushing and put the catch container on top, you replace the shell holder with a push rod type thing and just push them through with your press. You just about need a single stage press to work it though.