Help Needed To ID This Crazy Unusual 20 + Pound Projectile

[apfsds]

A friend sent me these photos to see if I could ID this projectile. I have no clue so I am hoping someone here may be able to help. The only info I have on it is, that it "is 95mm solid lead over 20 pounds with small center hole which goes nearly to the bottom. No markings."

Jason

 

[Spaceinvader]

Thats not a projectile, looks like a lead "pig". Used for putting radioactive substances in when in labs so it doesn't contaminant stuff with radiation. They come in all shapes and sizes. Cool item though.
Rhys

 

[bdgreen]

Just as Spaceinvader said, probably a radiation containment vessel to store a small container of a radio isotope or something on that order.

 

[apfsds]

Thank you both so much for your help!

Jason