People watch "Best of the West" and just think its easy....nothing to it right? I just have to lay down and spin the turret on my "Huskemaw" scope and pull the trigger. Yeah, that cant be hard at all, I think I'll give it a try. They said anyone can be a Long Range Hunter if I have their scope and shoot Berger Boo-lits!!
Jesus!!! I despise that show for this very reason! They need to be whacked in the head with their Huskemaw scope.
I love long range hunting. Ive engulfed myself in it over the last 2yrs. I made my 2 longest kill shots to date in October and November. The first was a coyote at 627yds with a 7WSM and the second was a deer at 689yds with a 6.5x47L. Obviously, neither of these are a .308. I practice alot! I shoot atleast 20 rounds a week at minimum and sometimes I'll shoot 35-50 rounds in a day. I put alot of focus on first round cold bore shots. That's what counts the most. On my property I have white backer boards set up at various locations and I'll "stalk" these targets as if in a hunting scenario. This was way I've been walking so I'm breathing a bit harder than normal. I have to get down prone on the gun cold. I range it and send it. I have 1" hot dots on the backer boards. A 1" dot at 500yds is a pretty small target, but it gives me a precise point to aim at rather than something so large like steel plates. No, I'm not "bulls eyeing" the 1" dot, but I'm in the vitals easily on a game animal.
Anyway, my point to all this is if you want to hunt long range then go for it, but you need to spend the time practicing FIRST. Don't use the deer for target practice. That cold bore shot is where it's at. If you shoot a decent group on rounds 4-9, that's not near as important as round #1.
As to your question on a .308......if long range is your game, then you are severely handicapping yourself with the .308. I'm not saying it can't do it, but why not pick something that can do it easy. Something in the 6.5mm shooting 140's or the 7mm shooting 168's to 180's.
Also....a few things your need to this right.
1.) a chronograph.....it's just almost a "must" if you don't want to waste alot of ammo.
2.) a good rangefinder....never leave home without it.
3.) a good rear bag.
4.) some type of ballistics calculator for dope that you trust/is proven accurate to compensate for varying conditons such as temp, humidity, altitude, pressure, wind. You can make a dope card, but a dope card made at 3,450ft on a 80 degree day with 53% humidity is not going to be accurate at 5,650ft on a 35 degree day with 75% humidity. You have to account for changes in enviroment.
Happy hunting!