id say that my ideal white tail gun is a 105mm howitzer. i just aim at the bush and hope that there are enough tags around to put one on all the deer in there. its also an effective way to clear sloughs for farming.
but seriously how many of us need to shoot a deer over 100 yards. if you arent sneaky enough to get within at least 200 just go home and buy an X-box.
keep the .30-30 your grandpa passed down and learn how to hunt like he did, youll have more fun than popping off rounds at 1000 yard distant bambi anyway.