When a 243 will do this with Nosler accubonds at 500 yards, in a 20 mph gusting wind...
That's a business card I'm holding above the marks.
Furthest I've taken a whitetail with the 243 has been 425-450 yards. They're rather small around here. I took a nice sized doe whitetail in Missouri across a cornfield at a measured 387 yards on a cold, crisp, calm morning. That doe field dressed 145 lbs by the processor's scale.
Placement and practice and bullet selection is the key. With the first two being the most important.