I take all my 40 brass and run it though a Redding GR-X resizing die before loading the round. This gets rid of the case "glock" buldge. I then load and case gauge with an EGW gauge. However for major matches I will go another step, and pull the barrel out and to confirm they gauge properly in the particular gun ill be shooting. Some say its too much work but I've never had an issue during a major match, and I can't remember the last ammo issue at a local. Rejection rate from not going in the EGW gauge is about 5-7 per 500, then they just go in the practice pile. Better than buying new brass IMHO. Hope this helps!