[LurpyGeek]

It's not a problem with the ammo. The problem is using a bottle-necked cartridge in a blow-back operated action. Firing with this combination means that the brass begins moving backward in the chamber before pressures have subsided enough to be safe, leaving the shoulder, neck and base of the casing unsupported. This means the possibility of cartridges bursting and venting hot gasses and debris out the action.

This is not an issue in bolt-action rifles.

The ammo will continue to be available.