.303 British
Headstamps and colour-coding
Columns: Headstamp ID | Primer Annulus Color | Bullet Tip Color | Other Features | Functional Type
VII or VIIZ | Purple | None | None | Light Ball | VIIIZ | Purple | None | None | Heavy Ball | G1, G2, G3, G7 or G8 | Red | None | None | Tracer | G4, G4Z, G6 or G6Z | Red | White | None | Tracer | G5 or G5Z | Red | Gray | None | Tracer | W1 or W1Z | Green | None | None | AP | B4 or B4Z | Blue | None | Step in bullet jacket | Incendiary | B6 or B6Z | Blue | None | None | Incendiary | B7 or B7Z | Blue | Blue | None | Incendiary | O.1 | Black | Black | None | Observing | PG1 or PG1Z | Red | None | Blue band on case base | Practice-tracer | H1Z | None | None | Front half of case blackened | Grenade-Launching | H2 | None | None | Entire case blackened | Grenade-Launching | H4 | None | None | Case blackened 3/4" inch from each end | Grenade-Launching