ORIGINAL: Alsatian
If I had a .338 winchester magnum, as someday I would like to, I would not hestitate to use it on either deer or pronghorn antelope. As someone pointed out, larger, heavier bullets won't expand on deer -- which means they won't destroy a bunch of meat -- but they will probably kill the deer or antelope just as effectively. Larger calibers may also qualify -- .375 H&H, .416.
Obviously you don't need .338 to kill deer or antelope. But what if it is raining, your other guns (.30-06, .25-06, .243) are all nice wooden stocked guns, and your .338 is stainless with a synthetic stock, which rifle do you take into the steady rain?
Of course, you have to be careful of your backstops with such a powerful cartridge, but you are supposed to be taking care that your bullet is safely contained even if you miss your target anyway.
UHHHH maybe you need to go look at guns there alsatian . those other guns(30-06,25-06,243) ALL come in stainless synthetic versions. at least the ones in my safe are!
And take that old outdated 30-06 and shoot it at some steel plate and see the nice hole it leaves.
larger heavier bullets don't always mean a quick kill. i have trailed deer a long way after being hit by 45-70's and most recently a 450 marlin. and those heavy large bullets will expand.
But it's ok to desire a 338 win mag i wouldnt mind having one myself but then again i really would like one of each .