The 303 British has probably killed more animals and people than most any other five rifles combined. It has been used in Africa and Canada for well over a century. It has also wounded more game and people than any other cartridge. They are not the best rifle for handloader as the brass life is short except in the 303 rifles made here in the states during the war for the brits useing the Eddistone and Remington made rifles. I have one if the Canadian ones. Excellent condition and one if the American Eddiestone versions. With good bullets,and the best for big game is probably the 180 grain round nose, they will kill like a 30-06 out to 200 yards. Much past that and they loose steam pretty fast. All and All they are a great old rifle with more history behind it than one would ever care to read.