This FMJSP (full metal jacket soft point) 303 calibre bullet is 0.311″ in diameter and comes with a cannelure to help secure the crimp.
The full metal jacket bullet is not to be confused with total metal jacket bullets. The front of these bullets has exposed lead. This bullet was designed to handle the higher velocities of a rifle round. They are a consistently accurate, bullet that gives you a flat-shooting trajectory.