I see that the last post was a few years ago. Incase anyone is interested or still visits here I use a 35 Whelen almost exclusively for most of my hunting. Including Okahoma whitetails.
The best bullet I've found for my rifle (Model 700 Remington) is the Hawk Spitzer 225 gr. .035 jacket. my load is 59 gr. R15 with Federal primer. I don't know what the velocity is but I bet it's pushing 2,700 fps. This load is very accurate at 1 MOA or less when I do my part correctly. It's accounted for a dozen deer several hogs and 5 elk.
I've never recovered a bullet but from any of the game but I like the fact that there's no tracking involved. everything I've shot with this load has dropped immediately in it's tracks. The elk were all cows but 2 of them were very large and the exit wounds were approx. 2". The farthest shot I've taken with this gun was 223 yds on a large cow elk
grazing in the open. she dropped where she stood. I'm very pleased with this combination. I might add that the deer hit with this round doesn't have that much meat damage with just a good full penetration and a quarter size exit wound. I have used the 225 gr. Accubond bullet on a spike bull elk several years ago and he didn't take 5 steps and he was down. again full penetration and the shot was 112 yds. There is bullet manufacturer that has come out with some very interesting bullets called Cutting Edge Bullets that offers a .358 bullet called the Raptor. I think it weighs in at 160 gr. but has 4 petals that break away inside the cavity of a game animal causing a lot of terminal damage inside. I'll have to experiment with some soon.
--Walkabout Hunter