Not familiar with the 40 caliber rounds, but Glock 45's seem to do "strange" things to cases.
My own brass, or cases fired in non Glock pistols, 45ACP, resized without problems. Range pick up, fired in Glocks, when resized ends up trying to look like a belted case. When I see that, I pitch the brass. I can "feel" the difference in the resizing operation too.