Sorry, NO
The .303 British cartridge was first conceived in 1888 and immediately adopted as
the standard service rifle round for the British Empire (later, by the British Commonwealth).
Originally it was loaded with a 215 grains ball and with 70 grains
of black powder, which was extremely compressed within the case.
In the year 1910, the caliber was modified with a 147-grains Spitzer bullet and with a smokeless propellant load.
https://www.all4shooters.com/en/Shooting/ammunition/303-British-hunting-shooting/