Please define "performance" first. In hunting it DOES NOT mean how well it flies and bucks wind. It means WAY more about how well it expands and yet doesn't come apart so you can get an exit wound. Oddly it's more important in elk hunting then deer OR moose hunting. Moose don't often run full out when shot,and deer fall to the old 06 very very well. It's actually more power then needed for deer.....but so what?
For the issue you mention (elk, moose and deer too) BC is nearly meaningless. If you can judge the range or measure it, you simply hold for the drift and drop of your round and forget all the hoopla about one bullet shooting flatter or bucking wind better. It's 98% about you the shooter, and 2% about the round you shoot.
The 30-06 is the standard by which all others cartridges are measured and it's been doing a wonderful job making meat out of all 3 animals you named since 1906.
If you want to make a choice from the 3 you listed only, I would flip a coin between #1 and #2 and leave #3 out of the race.
For target shooting or varmint shooting, the issue of BC makes some small difference, but not in hunting and especially not in hunting game as large as elk and moose. If you are looking for long range shooting on targets or varmints you should look hard at the Burger too, but it's not going to be as good all-around for hunting elk and moose as the X or the Accubond.
pretty much what i would have written, but this excellent summary was posted first!
