1. the old gun bullet's motion caused by the gunpowder smoke, but at present, the gun does not cause smoke.2. guns in the past, they used live ammunition as the sphere differs from the current bullet is tapered shape.3. guns in the past, there will be a way to shoot the gun closer than at present.4. guns in the past, there will be less precision bearings today. To aim a shot based on experience is important.5. power on the destruction of the guns in the past, there is less violence guns today.
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