Here are a couple pictures of the Powder Bag for the 16" Gun, (This one is going to ozziammo as soon as I get time to disassemble it).
For anyone who has not seen these before, the interesting thing is that the “filler” is a plastic “drum”, and the bag is laced closed on the side.
The lacing goes around the end that has the “priming compound” in it [Correct term?], which says “IGNITION 350 GRAMS” under the plastic wrap. It should be easy enough to unlace it and remove the innards.
Now I understand why my friend who is selling them is not interested in removing the inner form to ship them…