Recommended charge?

Bronze. One inch at opening. A little wider in the bottom half. About 2-3/4" deep.
Apparently last used as a candle holder. No maker's mark.

 

As it appears to have a touch hole, I assume you mean gunpowder charge for use as a signal cannon. Might be more appropriate in the Militaria category.

 

Is that really what this is? What is the search term for this? I didn’t see much similar (I must be missing something) Is a charge the same as holder?

 

on the googles, virtually all images for 'signal cannon' are toys

 

Try googling "thunder mug signal cannon".

So, what do you think it is, and what are you asking?

 

Thank you. Just had a look at Thunder mug signal cannons. I had no idea,very interesting.

 

@springfld.arsenal

1/8" fuse hole