Cadet training cartridge formed by necking the .303 British to .25 caliber; used in Australian and British cadet rifles to reduce cost and recoil while maintaining .303 brass.
Type: Rifle
Introduced: 1906, Australia
Parent case: Proprietary (.303 British necked down)
Standardization: Military
Bullet diameter: 0.257" (6.53 mm)
Rim type: Rimmed
Primer: Boxer Small Rifle
Production status: Discontinued
Also known as: .303-25 · 25-303 · .303 Cadet · .25-303 Cadet
History: Developed for Australian and British cadet rifle training in the early 1900s, the .303/25 allowed cadets to train with shorter single-shot rifles using full-length .303 cases reformed to .25 caliber. The lower powder charge reduced recoil and cost while familiarizing cadets with bolt-action operation.