Let me chime in with my 2 cents worth. I can totally relate to what the other mature guys say about weight and age. When I started hunting deer and/or moose, I used a full military Lee Enfield No.4. At that time,I was built like the proverbial brick s#@t house, and a heavy rifle didn't bother me at all. I nailed my first deer with that venerable old rifle at about 150 yds. with a lung shot. Time went on, and I got a great deal on a Ruger M77 varmint rifle (the older one with the blued barrel and walnut stock) in .308 and it came with a Leupold VariX2 2.5-10X40. Again, a heavy rifle but no problem at the time. It did great for precision range shooting and it got me a lot of deer over the years. It was never a comfortable rifle if I had to push or bush walk due to it's weight, but for almost all of my hunting years, I've been just walking to my chosen spot and spending the day sitting.
Now I have a sporter No.4 that's a much more comfortable rifle to lug around, and if I'm pushing or scouting I like my 20 ga. slug gun. Everything has glass on it, and I don't have the muscle mass I once did, so I've had to make certain concessions to the years. If I was your age, I would buy a nice .308 with good glass. You can't go wrong with Leupold, higher end Nikon, or even Bausch & Lomb, and not break the bank. If you don't hand load, look into it. I load for all my rifles, but over the years I have worked up match and hunting loads for my .308 and I can take it to range to shoot for distance or just look at my reloading logs for the best deer, moose, or bear load. Given the sheer number of bullets available for that calibre, you can't go wrong.