My niece's son and I sunk some of my model boats in the stock tank from about 200 yards. We were using a Remington 514 single shot and a Marlin Model 25 with various Federal, Winchester, and Remington 40 gr round nose bullets from bulk packs. What they will formally do at that range I can't say but once the holdover was determined, it wasn't too difficult to lob bullets close to the ships.
