Appearance of bullet vs glass impact

[Calhoun123]

My office may have had a window shot. I don't have a picture, but let me describe it and see if you think this sounds like a bullet vs some other object.

The window is about 8' tall and 18" wide, located on the second floor. The impact site is waist high. The glass is about 1/4 inch thick. The outside of the window has a 1mm hole and the inside of the glass has a 1 inch diameter section blown out. It is a perfect symetrical cone with some glass fragments inside the building.

My thought is that something hit the outside of the window (a point of office debate). Given that the "cone" is perfectly symetrical the thought is that it is a bullet fired straight at the window as opposed to something such as a rock kicked up by a lawn mower or weed wacker.

Anyone have any thoughts? I have no experience shooting glass, save for bottles.

[Zhurdan]

Did you find a bullet? If not, weedwacker.

[200RNL]

Steel BB from a BB Gun?

[Inkslinger]

Steel BB from a BB Gun?

Bingo!

[Calhoun123]

I was thinking steel pellet rather than BB, but same difference. I wondered if it might have been a .22.

[jmoore]

1. Are there any fractures from the cone? Specifically - are they radiating or concentric (or both)?

2. Any transfer (gray or copper) at the actual hole?

3. Though not always the case, a symmetrical hole/exit cone usually indicate a symmetrical projectile.

4. Whatever hit the window was low energy, or it would have penetrated. It's amazing how a tire can "squirt" out a rock at a decent velocity, btw. How far away is the nearest street?

Probably nothing to worry about, at least not until you see lasers dancing around on your chest:)

John

[Calhoun123]

The "exit" cone is a perfect cone. There is no splintering or anything. It looks almost surgical in its perfection. The 1mm hole is completely though the window. I didn't see any evidence of lingering material at the edges of the hole. Nobody found a projectile.

The window is above a small parking lot and perpendicular to the road so it could not have come from the road itself. It overlooks a city yard where maintenance vehicles/tractors are parked. There is a 6 foot fence between the yard and the parking lot. This was discovered right after a Mardi Gras parade which took place about 100 yards from the building.

[militarymoron]

i'd bet it was a BB gun too - that's what happens when you shoot BB's at glass.

[Sgt_Gold]

i'd bet it was a BB gun too - that's what happens when you shoot BB's at glass.

I agree. I had the exact same type of damage from a BB fired from a pellet pistol. My dad was NOT happy.

[Failure2Stop]

1mm is too small to be a penetrating shot from a firearm projectile.

BB or debris.

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