I guess I didn't make myself clear, gee even after reading it myself it makes no sense, LOL. what I meant was, if it were a Blank cartridge for ceremonies, why did it have a round on the end?

That's a good point because with handguns, blanks emit a small amount of discharge and it can be very ****erous if held too close to somebody. I'm sure with a cannon they must have a way to make the boom without too much coming out.

I just don't know enough about them.