I have killed a bunch of white tail deer with 260 Rem and 6.5x55 and 264 Win mag. In the 260 and 6.5x55 running the 120 Nosler BT 3000 fps and the 140 Sierra SP 2850 fps are VERY DEADLY on deer out to 500 or so yards. Have not shot any much over this yardage. I run the 130 Accubond 3350 fps from the 264 Win mag and it is AWESOME. It acts the same on impact from as close as 30 yards to a touch over 500 yards so far. It will enter a front shoulder take out the vitals and exit the offside shoulder with a quarter size hole and the deer drops in it's tracks. I have killed about 15 or so with the same results. It flies like the BT starts to open up like the BT but holds together like the partition and keeps on trucking. For deer you can't go wrong with any of these bullets. For those who worry about messing up the shoulders then don't shoot them in the shoulders. I don't like to track deer into the swamps around the bean fields I hunt over in NC so I shoulder shoot them and they are usually DRT. Shoot them behind the shoulder and they are dead but a lot of times they run off 50 to 100 yards before the "your dead" message gets to their brain. The problem that people have with BTs "blowing up" is that they try to run them too fast. These bullets are designed to have impact velocity under 3000 fps and from my experience impact velocity between 2800 and 1800 fps is about perfect with BTs.
