My hope had been that it would provide a good clue so as to trace the killer's past movements. I'm sure he could have bought the bullets on the black market with no trace but if he did buy them legitimately, maybe the people that sold him the ammo will remember seeing someone else with him and then the police could round them up. I bet there's a nest of these little extremists somewhere. They may not all be guilty of murder, but there's still arson, extortion and other things they may have done or will do in the future.
Plus, too, I had been thinking they got the ammo sent to them from some extremists in the States who could get hold of the ammo easier. If there's a connection there it'd be great to expose it.