[Dangerzone]

Shocker
3f examine the marks on the bullet
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normal weapons have spiral grooves in the barrel
these grooves put a strong "spin" in the bullet, because it is easier for a spinning object to travel in a straight line, and enter a target
like a screw or a football spins
but the marks on the bullet oppose each other
meaning the bullet changed its direction of rotation while going through the barrel
a normal barrel has lands and grooves to put a "strong" one way spin on a bullet
but in a barrel with no grooves, tiny imperfections in the barrel put a "weak" spin on the bullet
meaning the bullet does not spin in one direction, what it does is turn back and forth while traveling down the barrel

the fact that the bullet had time to change directions a few times means that the barrel was at least 3 feet long
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