The 2nd cartridge with the shaft out the front is a round they used to train with for the '03, there was a special tube that fitted into the bore with and internal rod, the small rod in that cartridge when chambered was held just off that rod in the bore, there were special targets that the shooters set up with aiming marks calibrated in size to represent actual sight picture with another one in line with the muzzle under neath the one they sighted on.
The muzzle was almost touching the target so when the shooter fired the weapon the F/P hit the primer disc causing the rod to move forwards inside the cartridge (spring loaded) which then hit the rod in the barrel this in turn moved out to puncture the target directly below the one the shooter was aiming at. It was used by the USAteam whilst sailing to Britain
on a ship so they could practice on board so as not to get stale, the kits were cased and had 5 rounds, they are not often seen good pick up.