That could leave a person guessing. To put a fresh charge in without firing a weapon (besides cleaning after firing to leave loaded again for any amount of time, a noise issue if trying to keep a low profile.) a puller the answer.I wish so badly I could put the story together.
I actually found a canister shot with grape shot still in it just the other day in the same area.
I'm stressing at the moment because in haste I put it behind a tree during a lightning storm that caught me off guard and managed to leave without it!! I know I know... How the.....? I'm heading back there tomorrow