Any help you all can give on this is greatly appreciated. I live in Columbia, SC and I was walking in the park behind my house the other day on an old road bed (I believe it is the original main street as current main street is not far) and found a bullet/casing right on the surface. I have looking in a couple books on cartridges without anything similar so I thought I would put it up on here. The bullet is worn so I am unsure of its caliber but the casing just above it measures a little over .36 so .36 or a little less is my best guess for the bullet. The casing tapers at the end and has a solid end. I am unsure how to clean it so I am unsure if there is any writing on the end. Does anyone recognize this cartridge? Also, is it advisable to clean it in any way or just leave it in dug condition.