I know of a fellow who loved shooting muzzle loading cannon his wish was to be sent on his way with a bang! so copper plumbing fittings (bore size) were engraved with his name the date of birth & death these were assembled and fired out on the property he loved to shoot and hunt on...... seems to be a nice send off,
I still have my wifes ashes, I lost her to cancer in 09, my plan is to keep her till my time and have them send us both off together I know a fellow with a 9" dahalgren.....not sure the wife would aprove..... but it will be a good send off....
My wife's uncle had his ashes shot out of a cannon almost 30 years ago. It was a full size reenactment cannon he named after his wife. He said he named it after her because they both make a lot of noise and don't do much.