Yes, I'm going to have to contradict the scare-mongering misinformation. I am speaking as the co-author of the 552-page reference book "Field Artillery Projectiles Of The American Civil War," and as a US-Government-recognized expert at deactivating civil war era (and earlier) artillery projectiles, for over 40 years. The US National Park Service has used me to "make safe" several civil war shells found by Park Rangers on Battlefield Park properties.
In actual, well-proven fact, cannonballs (even explosive ones) are NOT dangerous to handle, or drop. The proof: we relic-diggers have dug up about 100,000 civil war (and earlier) artillery projectiles, without even a single one exploding during the digging-up process. We commonly, unavoidably hit the civil war artillery shell with a shovel when digging it up, because you don't know you've gotten down to it until you hear the shovel go "clang." I repeat, for emphasis, not even one explosion resulting from those 100,000 digs. Which proves that unlike more-modern artillery shells, excavated civil war (and earlier) ones are not "shock sensitive."
On ALL of the few occasions when a civil war artillery shell has exploded in modern times, somebody was either using a power-tool on it, or they put it in a hot fire or oven. If you can avoid doing such provocative things, the only way a pre-1870s artillery shell can hurt you is if you drop it on your foot.
I'm sure some people will want to argue about that, but I say, they will be arguing with the 100,000 no-explosion excavations of civil war (and earlier) artillery projectiles.
Somebody in this discussion-thread said "When finding cannonballs, do not touch, call the police. You live longer."
I'm sure that was meant as well-intended advice... but it is incorrect. The reason the police broadcast the message that ALL artillery shells are too deadly for a civilian to even touch is, most civilians and even most policemen cannot visually tell the difference between a relatively harmless civil war shell and a genuinely deadly World War One (or later) shell. So, the rule is to treat them ALL as if every one of them is full of Nitroglycerin. Okay, I can understand that, at least for the "bullet-shaped" artillery shells. But because there's no such thing as a cannonball filled with 20th-Century high explosives, all cannonBALLS are harmless to simply handle, or even, to drop on the sidewalk.
For Gregor, the finder of the Mohave Desert ball:
When a cannonball is loaded into the cannon barrel (and when it gets fired), it "rolls over" as it travels along the inside the (pipe-like) cannon barrel. Therefore, it MUST be carefully manufactured to be perfectly-round, because if it is even slightly out-of-round (like, egg-shaped), it will jam inside the barrel. That is very bad news for the cannon crew, especially it if happens upon firing the cannon, because jamming can cause the cannon barrel to explosively burst. The Mohave Desert "ball" is clearly out-of-round, as Gregor himself mentioned... so it absolutely cannot be a cannonball.
I co-wrote a detailed educational article on how to determine with 100% CERTAINTY whether a metal ball is an actual cannonball, or not. You can read it for free, online, at:
SolidShotEssentialsMod