(Note: I'm reposting my reply from a more-recent discussion thread, due to multiple posts of this ball by its finder, under different posting-names.)
Your questions about that bronze ball have already been answered in replies to your many previous posts of it. But since you are unsatisfied with those answers, I'll give you mine. I do not mean any of the following info as bragging -- my intention is only to give you a "Credibility Rating" for my answer to your questions. My professional credentials for answering:
I've been a nationally-known dealer of historical cannonballs for nearly 40 years.
I'm a multi-published Historian author of books and magazine articles about cannonballs.
I'm a paid Consultant to various museums (including the US National Park Service) about Historical artillery projectiles.
There are several characteristics which absolutely disqualify a metal ball from being a real cannonball. Some of the disqualifying characterstics are:
1- being an incorrect shape (such as out-of-round, even a bit egg-shaped)
2- being an incorrect metal
3- being an incorrect size (diameter)
4- being an incorrect weight
5- the presence of markings such as letters or numbers
6- the presence of flat-spots or a raised band
7- having too many "fuzeholes" in it.
Your bronze (or perhaps actually brass) ball is disqualified from being a real cannonball by reasons #1 and #2. There's no need to go any further down the list. Your photo shows it is somewhat egg-shaped. (Even excluding the shadow around that ball's lower left edge.) EVERY real cannonball was very carefully manufactured -- and inspected afterward -- to be perfectly round. (That's known as a "True Sphere.") The reason is that if a cannonball was even a little bit out-of-round, it could jam in the cannon's barrel during loading or firing, thereby causing the cannon itself to explode. That's why an Artillery Ordnance Inspector very carefully checked EVERY cannonball to make certain it was perfectly-round.
Disqualifying reason #2 is that you said (in a previous post) that your bronze ball was found in a Michigan lake. As you've already been told, it is a well-documented Historical fact that no bronze, brass, or copper cannonballs were ever used in North America -- except for a few Mexican-made ones at a US-Mexican War (1847) battlesite in Texas near the border with Mexico.
You asked what your bronze ball actually is. My answer:
Iron is the cheapest of all metals. When a ball is made of a more-expensive metal than iron, the reason is, iron is considered "unsuitable" for the ball's intended purpose. For example, as you know, iron is subject to rapid rusting, and it also can cause sparks. Your ball is made of the more-costly metal bronze (or perhaps brass) in order to avoid corrosion or sparking during its intended use. It was most probably manufactured to be a "Crusher-ball," for pulverizing coal or some other flammable material ...or a material which is corrosive to iron, resulting in contamination of the material during the pulverizing.
There is one other possibility. Your ball may be an inaccurately-weighed Sports Shot Put ball. Some of those are made of bronze/brass ...like the one Vhs07 posted in reply to one of your posts.