The .303 British is very common here in Canada, specifically BC and Alberta for hunting all species of big game. Mostly used by lower income families, it is also used by those who grew up using a #1 Mark 3 for all their hunting. One such person is a very good friend of mine.
: Currently in my stable there is 1 #3 .303 as well as a #4 that I converted to .312 Express. I am also in the throes of re-barreling an Enfield P14 with a .308" barrel, chambering to standard .303 so the fellow can use 220gr. hornady bullets accurately, as well as perhaps firing factory ammo if need be.
: I suspect Keith has probably shot hundreds of black bear and at least that many Moose and deer with a .303, mostly using the 215gr. RN factory ammo. For handloads he uses a 180gr. bullet of about any manufacture and IMR 4320 for around 2,450fps. he prefers the heavier bullet of 215gr. which is no longer available here, hense the chambing of standard .303 in a .308" barrel.