Highpower3006, you have some really great stuff there. Love looking at pictures like these. thanks for posting them.
Picked up a cartridge collection many, many years ago that had 2 or 3 boxes of those shot cartridges. One of the boxes was broken up and the shot cartridges were selling for something like .05 or .10 cents apiece to collectors, so they were taken to the range to try them on targets. They box claims 25 feet max range but if my memory is still correct anything anything over 10 feet away is not likely going to get a enough of the shot to die fast enough for it to be recoverable from as raft.