http://www.rifleman.org.uk/Hollifield_Dotter.htm
http://cartridgecollectors.org/cartr...lifield-Dotter
"Perhaps one of the most unusual U.S. dummies is that designed for the Hollifield Target Practice Rod device. This ingenious device fitted in the barrel of the M1903 rifle and was essentially a rod with a sharp point on the end. These special dummies, which also had a rod in them, were placed in the chamber. "Firing" the rifle resulted in the rod in the cartridge transmitting the blow to the rod in the barrel which popped out of the muzzle, pricking a paper target held just in front of the rifle. These dummies were made from fluted and smooth cases. Look for the slightly protruding rod at the bullet tip."
Source: http://cartridgecollectors.org/?page...-06-cartridges