[null and void]

The actual projectile *could* be the same, the case determines how much powder/power is behind the bullet, and the type of weapon used to send the bullet down range.

[blau993]

The actual projectile *could* be the same, the case determines how much powder/power is behind the bullet, and the type of weapon used to send the bullet down range.

Yes, that is what has me confused. I hear the cops say they have determined that at least five of the shootings were related, but I don't know what that means. I have not heard anyone say: "To a reasonable degree of scientific certainty, the ballistic evidence establishes that rounds recovered from five of the victims were fired from the same weapon." That I could understand. What they mean by "related" I do not understand.