I too have found the occasional unidentified 'iron ball' on homesteads, to date I've only had one conclusively identified as War of 1812 grapeshot.
I hope your find turns out to be the real deal, we all deserve to find a cannonball at least once in our lives.
I will get measurements /weights the interesting thing is the spot I found it has been a ice cream stand since I was born before that a old house/hotel that’s all anyone knows however about 150-200 yards north is a 1700s house that I know the main branch of the cont army stopped at entities to Philadelphia PA after the rev war ended as a riot had broken out they were allowed to stop and cook n eat their provisions on this lawn back then it was probably all one property and I googled awhile back how many soldiers were in the cont army and it was somewhere around 10000-12000 mine looks in perfect condition and I think is all lead like a musket ball sometimes I find musket balls in the same shape I’ll be curious to find out that would be pretty cool picture red dot is where I found it blue is the 1700s house