Brithunter,
I understand what you are trying to say, but I must side with Swampman on this one.
Here in the U.S., the .303 British is simply not very popular at all, and is not even viewed as a "classic" round. Out of the perhaps 100 deer hunters and shooters I have known in my 45 years of hunting and shooting, I cannot think of one of them that hunted with or shot (that I saw) the .303 round. I have shot a few Enfields in my time, so I have shot the round.
I think that the reason for this is, that the. .303 round was never associated with high-grade or African hunting here. It never acquired that mystical quality or romance that the British have for it. Instead, the primary contact that Americans have had with the .303 is that if you didn't have enough money to buy a surplus Springfield for hunting, you were forced to buy a beat up Enfield. As a young man, I can remember seeing racks of really bad Enfields for sale, even in department stores, for about $100 each. And at gunshows, you see lots of really poor "hack jobs" from people who sporterized them (badly) in their garages.
So here in America, the .303 British round was viewed as a "milsurp" round, much as we view the 7.62x54R rimmed Russian round today. Yes, it is powerful. But it is only "almost as good as a .30-06",yet plainly not as good. It is viewed a second place contender, a poor runner up, a wanna be, to the .30-06 round, which is ubiquitous here in the U.S. It is everywhere, in anything that shoots, it is the gold standard by which all other centerfire rounds are measured. Even among people in the U.S. who know zero about guns (or even hate them), if you asked them to name a rifle round, they would immediately say ".30-06."
As for the .30-40 Krag, it is not highly popular in the U.S., but what it has going for it is that it was a former U.S. Military cartridge, with all of the allure of its predecessor, the .45-70. And, since there are still lots of original and well done .30-40 Krag sporters at gunshows, one is still constantly reminded of the round. To Americans, the Krag rifles "feel" very very historical and interesting when we pick them up, whereas the Enfields do not. In a sense, the .303 British round is viewed as somewhat "Un-American."
That having been said, I personally believe that the peep-sighted Enfields were the very best bolt action battle rifles ever produced, and that the .303 with its big round nosed bullet is generally adequate for anything that a .30-06 could do. Problem is, that when hunters in the U.S. consciously want to go down one-step in power and recoil from the .30-06, they are instantly at the wonderful .308 Winchester (for bolt actions) and the extremely classic .300 Savage round for lever actions (100 years of excellent hunting history.)
Hope this explains somewhat Swampman's viewpoint on the .30-40 Krag, and mine as well.
Best Regards,
Mannyrock