Heath Lovel on Instagram: "PORT ARTHUR MASSACRE: BULLET CASINGS According to the police investigation, the bullet casings found on the floor of the Broad Arrow Cafe were from a Colt AR-15 .223 semi-automatic rifle. The weapon used in the initial cafe shooting was a Colt AR-15 chambered in .223 calibre (which uses 5.56x45mm ammunition, but the specific calibre mentioned in sources is .223). Later in the incident, at the Seascape cottage, a different weapon was used, a L1A1 Self-Loading Rifle (SLR