I would think B.C., Alberta or Saskatchewan for really big Whitetail deer.
: We're getting a god huntable crop of big Whitetails around here, even, in the Prince George area & friends who target big bucks wiht their bows, hunt in B.C.'s interior around Quesnel an South for their trophies.
; The question was about big bucks, wasn't it? Not only antler size but nice fat bodies as well. The little buck I shot a short while ago, locally, was perhaps 210pounds to 230 pounds on the hoof, maybe more. He had a fat layer 2" thick on his hindquarters & hind end meat was marbled - great eating, btw. I was quite impressed at the amount of fat, not normal for Mule Deer here. Unfortunately, he was a genetically inferior 3 point. (per side + double brow tines = 8, I guess, Eastern count) Here, he was a 3 point. He was only 3 years old, or so, so was on the small side, actually similar to the 3 point in the photo above.
; My daughter uses a .260 Rem, I've used a 7x57 on a couple, .458Mag. on others and a 6.5x55, .375H&H, .69 ML. & .50 ML. They die easily, so about anything is good enough from about a .243 up. The bigger guns drop the deer and just punch a hole, while the small fast ones will destroy some meat and cause them to run a bit. Here in B.C., an centrefire is legal from my gophers guns in .17 to a bore sized rifle or shotgun. Stay away from buckshot- it's poor on deer or bear. You can actually hunt and get shots inside 100 yards, or shoot from the road at longer ranges - whatever you want, pretty simple.
; edited- had shoot from a velicle - strickly forbidden, of course, meant from a road or off the hood.