Re: need a new deer rifle
Judging from your location and little information I'm going to guess that you do a lot of hunting in heavy brush and probably some swamp areas.
I've found that a 20" barreled rifle is just about right for that, something that's easy to use in a climbing stand, decent punch for those longer shots but not a massive magnum fireball thrower that destroys animals inside of 300yd.
The problem that I have with humping a 308 platform AR is that they're freakin' heavy compared to a well built and proportioned bolt or lever gun. Since you might get the occasional shot past 200yd I'd skip over the lever and get something like a Model 7 Remington in a medium caliber like 7mm-08, run a 20-22" tube on it and use the 140gr class bullets. With a good hunting scope (like a Conquest or compact NF) you can built an easy to handle rifle that is 8lb or less, effectively half of the AR10T.
I have an LR-260 that would make a nice plains rifle with the 24" heavy barrel and excellent long range capability but it weighs around 15lb with the 3.5-15x50 NF NXS on top, Magpul PRS stock and bipod. Not something to be lugging through the swamp or hauling around in a climber.
That's my opinion on it.