Thread: 303 Cordite regulation load modern powder data

Greetings,
In my near new 2 groove .303 barrel 32 grains of AR2206H gave around 2,050 fps with late manufacture 174 grain Hornady RN. The later projectiles are blunter and gave around 150 fps more velocity than old ones that were in stock. .303 velocities are all over the place, perhaps due to differing amounts of throat erosion. Differences of up to 300 fps for the same load were found. Perhaps starting at 32 grains?
Regards Grandpamac.