Real Cannonball?!

[Mielke82]

I've been sitting on, (what I'm sure is a 3.inch diameter cannonball) since I first found it as a child in a large open field while playing in the dirt in Milwaukee, WI. How can I find out more information on it? Send a picture with the dimensions? There's about an inch round flat spot on it and seems to have another smaller circle inside of that one. I'm just not sure?.. Help please

 

[silvermagnet]

you must have been very small to have been able to sit on it

 

[TheCannonballGuy]

Super-precise size measurement (in hundredths-of-an-inch) and well-focused closeup photos are needed to enable us to tell with certainty whether your ball is an artillery ball or not.

Meanwhile, useful information for you is here:
SolidShotEssentialsMod
and here:
www.civilwarartillery.com/shottables.htm