If the true Glock bulge is resized the case will deform and blow out at the weakened point at the base.



I still run all my .40 S&W range pickup brass through a Lee bulge buster. This is like using a small base die and returning it to minimum SAAMI dimensions.

I also bought a Lee 9mm makarov carbide factory crimp die as a bulge buster for 9mm. "BUT" it reduced the rim diameter .002 and none of the range pickup brass benefited or needed this treatment.