OK, everyone has sung the praises of the 303, including several saying it probably has accounted for more game animals shot in Canada, than any other calibre (cartridge.)
This I can't agree with. Up until the WW Two era, rural, northern and remote areas of Canada lived on wild game. It was very rare for a family not to have firearms, and they shot game all year around, while playing hide and seek with the game wardens. A lot of game was shot. I know two different families that shot between thirty and forty head of moose and elk each, during the 1930s. Multiply that by the great numbers, proportionally, of people in the remote areas and you have more than a few game animals butchered.
As a boy, I grew up in the world I'm talking about. As ten and twelve year old boys, we could ryme off what rifle virtually every homesteader in the area had. I felt discriminated against because I had to wait until I was twelve years old before I could take a rifle out in the bush by myself. Many of my friends were doing it from age ten.
All this is to point out that I was familiar with what homesteaders in our area shot game with. And I think our area was typical of all such areas in rural Canada. We lived on the edge of northern trapping areas, also, and I was 25-20 familiar with many of them and the rifles they had.
There were more 30-30 calibre rifles than any other. Maybe even as many as all others combined, but maybe not. Other calibres, and don't someone say I mean "cartridges," because of course I mean cartridges, common in the area were many and varried. 38-55, 38-56, 250 Savage, 300 Savage, 30 and 35 Remington, 43 Mauser, 45-90, 30-06, 33 Winchester, 45-70, 6.5 Mauser, 351 Self Loading, 32 Special, 25-35, 44-40, 32-20, 25-20, 57 Snyder, and on and on. Oh yes, there were also 303 British, but while all of the calibres listed above I knew homesteaders of the area had, I can only place three 303, for sure, two being Lee Enfields and the other a Ross.
Thus, I have to say that without doubt, the 30-30 accounted for more big game shot in Canada than any other calibre.