I don't have the numbers but I would be pretty sure that the 303 has killed more game in Canada than any other rifle. The 30-30 certainly would be in the running and As a deer rifle in this country, I am sure it has taken more whitetail deer than any other cartridge. Some calibers are comming up fast but the 270 and 30-06 will be hard to beat out as well.I like them all but the 30-30 lever is a classic and one of the easiest guns to carry that I ever used.