Far left is a 7.62x51 with a steel case, headstamp L C 56
middle is a 7.62x51 with AP bullet headstamp L C 54
Far right is a 22/7.62x51 cartridge headstamped WCC 53. While doing some research on an article concerning the US T48 rifles, I found that 20 H&R T48 rifles were rebarreled to 22/7.62mm and tested at Fort Benning in 1956.
