Surely you jest. A .458 *anything* is gonna be enough gun for a hog.
The last time I went hunting wild pigs was in California, south of Hollister. I used my FN-FAL in .308 (this was many years ago when 'assault rifles' were quite rare and not at all illegal / subject to massive paranoia). I didn't feel undergunned. (I had a 20 round mag, which I guess is a bozo-no-no, but I was blissfully unaware of that fact, and only had a few rounds in the mag. The damn gun is heavy enough without carrying 1/2 a brick of .308 around with it.)
I've always wanted a .40 caliber. I really like the .416 Remmington Mag, but even Remington seems to be losing interest in it. It's big $$$ as the only guns it comes in are Custom Shop jobs.
Now I'm thinking I'll get a Marlin .444. I already load .44 mag and so can use the same bullets, I like lever actions and need a few more, it comes with iron sights, which saves a few more bucks, and would be a fine winter elk rifle in the thick, wet woods in the Oregon coastal range I hunt in now.
But I'm pretty sure your .458 will do the trick.
It holds an "appropriate" number of rounds for Oregon/Washington hunting regs as standard, too.