I had an inert .303 round stamped “R/|\L C IV” As the mark IV bullet is a hollowpoint (the round was made pre 1899), I pulled the bullet deciding it was the wrong one. I don’t think it is even a .303 bullet, as a Mark II .303 bullet is shown underneath, and it is clearly different. The diameter is also slightly different at about .315". Does anyone know what this is / how old it is / where it was made? The bottom bullet could me a mark II or VI, as these were identical apart from jacket thinkness.