Whatever is most accurate. It's a .270... don't overthink it.
I mean that I've hunted in other states with my Savage .270. Unless you are needing critical expansion at really long distance against thicker skinned game (elk, caribou, etc... which I handloaded Nosler Accubonds for and swear by them for elk at 500 yards) as long as the bullet is accurate, even the varminting stuff is adequate for deer at most distances we encounter hunting. My focus, however, is that most .270 rifles I've encountered ARE finicky for best accuracy, so get what works or hand load what will work. He asked about white tail and I can solidly say that even the Hornady Vmax varmiting rounds I've used worked exceptional on deer.The 270 Winchester is not only one of the most successful rifle cartridges over the last hundred years, or so, it is quite possibly the most versatile round ever devised. It's a superb long-range, heavy wind varmint cartridge, and is a perfectly suitable elk cartridge.
When it comes to hunting all of the thin-skinned medium game in the world, it continues to be one of the very best rounds from which to choose. Picking the right bullet for the job is part of the fun of reloading, as it allows one to tailor a load to a specific need.
So, when you say, "It's a 270...don't overthink it", what do you mean?
When I loved out west, Noslers and Barnes were the preferred bullets. But this was mostly for elk, where you'll need more penetration than for a WT deer.
I was looking at hunting calibers recently and it's likely that if the 280AI had existed first, we'd never have heard of 270 win. It's even more powerful, even more versatile, and is unbelted also. Compare the BC and speeds in comparable weights, you'll see.
Heck, I'm still considering 280AI for a hunting gun.