Is there a bullet that won't work in deer from a 338wm?
Nope. I even have some cast bullets I'd shoot the hell out of deer with. Most factory 338 bullets are constructed with elk hunting in mind. They generally have thick jackets, but still work great for deer. I have a buddy that only has 1 rifle and it's a 338 winny. He uses 210 partitions for both deer and elk around here with excellent results.