is this a c/w shell?

[Moe (fl)]

Need help identifying this item.

It was found recently (near water). It is about 6" inches long and 3 1/2" inches in diameter. It was found in an old area. It is very rusted.

Here are some pics:

Thanks.
Moe

 

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[trikikiwi]

I can't see how it could be a cannon shell, but I'm no expert.
BUT, it does remind me of an old water or sewer pipe, which I do know a little about.
Mike