Virtually any .458" bullet is sufficient for whitetails. Lighter bullets shoot flatter and generate less recoil.
Just for the heck of it I've been loading some Hornady 250gr MonoFlex bullets. I can get them to shoot well at 2,330 ft/sec (18.5" bbl) which shoots MUCH flatter than my usual 400gr loads. I took a nice size buck at about 90 yds with this load a few weeks ago. The buck was knocked sideways for a second as he spun around and bolted for the brush. Fortunately, he laid dead 30yds from the shot. The light mono bullet exited.
Use whatever you've got.
