A couple of years ago my friend who was working as an assistant guide brought a client into Moose camp. This guy was carrying a .308. A short gun, carbine lenght. I don't remember the manufactor, just a little bolt gun. Anyway I took him out to the river the day he arrived and had him shoot some targets. He hit them with decent groups, but I told him he really needed a bigger gun. He was offended, and started telling me how many deer that little gun had killed.
Four days later when he got his chance to shoot a Moose, he used all his cartridges, six rounds. He then watched the Moose walk away, and was unable to do anything about it. Using my .338 TCR I placed one shot in the center of the shoulder knocking the Moose down. I was sitting back in heavy brush, when I made the 300 yard shot. The client was over 500 yards from me and never heard the shot. The client saw the Moose go down and he thought his bullets finally did the job. I never said anything to him about it. When we were skinning the Moose out my partner found all six of the .308 bullets in the heart lung area. The client kept saying how it took all six of his shots to bring the Moose down. When my partner found the seventh bullet he noticed it was not a .308, then looked at me and smiled. We never told the client anything, let him think his .308 brought down the Moose. They deffinately would have killed it, just not soon enough for him to collect it. I shot it just as it was ready to step into the river. Once it had gone into the water we never would have found it.
Wonderful story, EXCEPT your comparing a moose shot in the lungs to a moose shot in the shoulder... Had he been using a good heavier bullet and shot the moose in the shoulder it also would have went down... Had you also shot the moose in the lungs with your 338, it still wouldn't have went down...
The moral to your story is, use good bullets and break the animal down, NOT that the 308 isn't enough gun for moose...
I like the 338, harvested a truck load of game with it, but i've also seen too many moose harvested with 308's and 30-06's to know that "they" also will have no problems with moose IF you use the proper bullets...
A 30-06 with 200 NP's will take moose at all angles within reasonable ranges, and even break them down with a shoulder shot if needed... Been there and done that more than one time in the 25 years i lived in Alaska...
DM