Main function of that gun is ground attack. Farther that ammunition type is used on a number of other platforms in US service. Primarily the AC130 Specter, M2 Bradley LAV25, and Mk38 series.Guns don't see much use anyway. This is not that big of an issue.
Despite what many of our members say. The US doesn’t like to make faulty equipment. It will be looked into I suspect in the near term an advisory prohibiting use of the specific 25mm round the PGU 32/B semi-armor-piercing high-explosive incendiary-tracer round till farther notice. During which an inspection of in inventory rounds as well as test firing will happen to make sure this was simply a freak accident and not something more.