Congrats on getting your first real big bore.
I had to check your About. You are in Wisconsin. Hmm...big whitetails compared to our southern - southeastern deer. Sooo....why not use your 458WM on whitetail deer? Oops scratch that you don't reload....Yet. But still....a proper weight solid bullet,....out to a reasonable distance,....Why not?
For plinking practice and for hunting you can, and I started with Hornady DGS and DGX, as being (locally) the cheapest and easiest to get. And they are effective on black bear, moose and elk.
For moose and grizzly / brown bears you might opt for premium bullets. For Africa you definitely may want to opt for premium solid and / or soft bullets. However, I'm satisfied with using Hornady bullets. But I also have a few premium bullets at hand.
Since I reload I use Hornady, Woodleigh, and a couple or 3 other manufacturers' 500 grain bullets and as I have posted a few times 250 grain For Use In 45-70 bullets for range testing.
For elk, moose and black bear in North America and as a one gun for Africa large PG; sable, eland, gemsbok, hartebeest, wildebeest, zebra, and having to purchase factory ammo, most likely a 350 or 400 grain bullet. With a 200 yard max shooting distance.
For DG definitely 450 grain or my preferred a 500 grain bullet. As 100 yards will be my max shooting distance with the 458WM.
Norma or Nosler once upon a time, I don't know if they still do, use to have big bore ammo sale specials at 50% off. I picked up quite a bit of ammo during these sales as the sales prices were about as or cheaper than per box of Hornady and IMO loaded with a better bullet.
Just my 2 cents. Because you asked.