I know there are a few experts here on this subject so I'm hoping one can give a little insight. I found this a few years ago while cleaning out an apartment of an evicted tenant. My first thought was it could be a cannonball but the "holes" didn't make any sense to me. I didn't put much thought in it and just put it on a shelf because I thought it was interesting either way. So this morning I decided to try to find more information and have now learned that some cannonballs are in fact filled with explosives and capped off. The ball I have is 5 pounds 10 1/4 oz and 3 1/2" diameter. There is a hole on one side that is 5/8" diameter and possibly a second hole opposite of the first one that is 1/8". Any insight is greatly appreciated.