My views on the Jungle Carbine are based on shooting one as a youth, it's a rifle that kicks hard and might make a new shooter develop bad habits. Either full sized Enfield or Mauser with a slip on pad is a fairly soft shooter because of thier weight, as compared to modern lightweight rifle.
I have fired a lot more Mauser rifles, and I prefer the sights of a Mauser, too.
A friend of my dad's brought a borrowed Enfield jungle carbine as his first rifle to elk camp of all places. He could shoot it, but even he has issues with the recoil and rarely fired more than 10 shots off the bench with the rifle. Think the .303 is probably enough gun for elk, but I wouldn't hesitate to think of the 8mm for game as big as moose.