Spread is the amount that your bullets are apart in WR. No spread, stick your crosshair tight so that the bullets do not spread.
i was messing wiht that adresses yester day i made it so my bullets would hit the ground under my feet when i was looking straight, i tried hitting some1 only 1 buyllet out of a hole clip of m4a1 hit them( i was like 2 feet away 2)