Also found in the same vicinity were three 6.5×52mm brass cartridges later proven to have been fired from Oswald's rifle. One of the empty cartridges, CE 543, was dented in the area of the neck. Ballistic experts testified to the House Select Committee on Assassinations (HSCA) that this likely occurred when the rifle was rapidly fired and the cartridge was ejected. When four test bullets were fired from the rifle, one of the four cartridges had a dented neck, similar to CE 543.