Unidentified from Chester County, PA. Is it Mushroomed Lead?

[X10Matt]

Hi All,

Uneducated noob here. Please excuse my ignorance as I'm just getting started in MD'ing. I found this object in my backyard. It is heavy (1.5 oz) and non-magnetic. I suspect that it is lead. It was about 4" deep. My home sits close to a protected historic district in Uwchlan Twp in Chester County, PA. I believe my property may have been farmland in the 1800's but I'm not sure. My home was built around 1969. Could this be some sort of shrapnel from the 1800's? Is it a scrap of machinery or construction equipment from the 1960's? Other than this, I haven't found much of interest in my yard: LOTS of nails & screws, a deteriorating wrench, modern loose change, a small metal rod and a 1972 Matchbox car. Any info or advice would be greatly appreciated.

Thanks!
Matt

Top View
You can see here that the top was round-ish but appears to be mushroomed. Notice the concentric circles. There is also a tear down the side which I assume is from some sort of impact.


Side View
This view shows that the object has sort of a "hat" to it. And, it appears to have ears or tabs on either side.


Bottom/Side View
The bottom has a divot in it which appears to have been somewhat round at one time. But, it has been warped along the side with the split.


Bottom
The bottom view shows a better shot of the divot.

 

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[DCMatt]

I don't get a sense that it is lead. Maybe a brass alloy of some kind? It looks like a big rivet.

DCMatt

 

[X10Matt]

I just scratched it with a pocket knife. It was fairly soft and has a shiny / silvery look like lead or tin

 

[nsdq]

shot gun slug

 

[X10Matt]

shot gun slug

Thanks. I just showed it to a gun enthusiast in my office. He said it looks like a shotgun slug with no rifiling. It appears to have hit something hard and stopped in place.