If im buying a bolt action to hunt whitetail deer with id likely buy another 7mm-08. .243 is another very viable option. 95 grain ballistic tips are lethal on deer. Dont let anyone talk you out of that cartridge, it is a laser and just plain kills. The ammo is also cheaper and more plentiful in the .243, new shooters and hunters especially need lots of trigger time. 6mm or the 6.5 creedmore are great rounds but are newish and may not stand the test of time. Years ago i would have said the .260 Remington another awesome cartridge that is barely holding on. A remington model 7 in .243 is a winner. .270 Winchester with 130 grainers is very manageable but with a long action the rifle is just that much bigger. Long story short, buy a .243.