There's absolutely nothing wrong with the the .303 British round or most of the rifles that have been chambered for it. But like the rifles, the .303 has been overtaken by others which are more suitable for modern conditions. It's longevity was not helped by the tapered, rimmed case.
Even here in the UK, where the .303 was once the most common full-bore calibre, it is almost exclusively used in Lee Enfield rifles of various vintages in classic matches. I am not aware of any production rifle currently chambered for it. That said, those old Lee Enfields still shoot reliably and accurately.
The .308 Win has now taken over as the standard round for basic target shooting, as this was the calibre of the SLR rifle (basically the FN FAL) which eventually replaced the Lee Enfield as the standard issue rifle for the British armed forces. While the military has since moved on to the NATO standard .223 round (in conjunction with the SA 80 rifle), it has not gained the same popularity for target shooting and is less suitable as a large game / deer round.
The .308 Win just opens up so many more options than the old .303 British.
My opinion, anyway!
Even here in the UK, where the .303 was once the most common full-bore calibre, it is almost exclusively used in Lee Enfield rifles of various vintages in classic matches. I am not aware of any production rifle currently chambered for it. That said, those old Lee Enfields still shoot reliably and accurately.
The .308 Win has now taken over as the standard round for basic target shooting, as this was the calibre of the SLR rifle (basically the FN FAL) which eventually replaced the Lee Enfield as the standard issue rifle for the British armed forces. While the military has since moved on to the NATO standard .223 round (in conjunction with the SA 80 rifle), it has not gained the same popularity for target shooting and is less suitable as a large game / deer round.
The .308 Win just opens up so many more options than the old .303 British.
My opinion, anyway!