Going back to a couple of studies that were done in Europe on thousands of moose kills, there was no significant difference in how far a moose travelled after being shot with everything from a 6.5x55 to a 375 H&H. THAT is how much good it does to nit-pick cartridges.
A couple of kills with any one cartridge do not prove much. I have seen whitetails shot with a 223 drop so fast that you could see four legs in the air as the rifle recoiled, and seen other deer shot with good placement by a 300 Winchester Magnum and 200 grain bullets require a finishing shot.
Remember, all those cartridge write-ups in the loading manuals that proclaim each and every cartridge to recoil less and kill better than similar cartridges, while exhibiting unbelievable accuracy, might be stretching the truth a little, because it is impossible for dozens of cartridges to all be superior to each other.
