Whether it fails is a matter of how it is subsequently loaded and whether the previously bulged area ends-up facing an unsupported chamber location in the chamber. If your gun does not have such an area, then it is less of a problem. But, if you are shooting it in a gun that makes those bulges, then sooner or later the previously bulged are of a "fixed" case will probably end-up unsupported when it is fired again. If that is done repeatedly until the case fails somewhere, that sooner or later one of the case failures could well be a blow-out at the web/wall intersection instead of the usual split case mouth.
Because other people may very well have previously "fixed" .40 S&W brass that I pick up at the range, I relegate .40 S&W range brass to mild loads, around 25,000 psi peak pressure. And, I am shooting those in Sigs which do not normally bulge brass with 35,000 psi loads.
SL1
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