I agree that a little more info on what you plan to hunt, and what you consider long range, would be helpful. If you are only hunting deer and want to shoot out to 300 yards or so, a 25-06, 270, 30-06, 7mm-08 or 308 would do the trick. The rifles you listed are on the lower end of the price scale, so I am assuming you are on a budget. Ammo for the standard calibers listed above is cheaper than 300 mag ammo, and you would not have to put up with the extra recoil. If you are going after elk that is another story. If elk is a potential, but not a given, I would go 30-06. You would not be undergunned out west with an 06. If you do get a 300 win. do not get a barrel less than 24 inches. You will loose some of the velocity advantage and greatly increase the muzzle blast. If you get a 300 mag for deer do not buy the cheapest ammo you can find. I have a 300 wsm that I ran 150-grain core-lokts through. They were very accurate in my gun, and I am sure at 200 yards plus would work great on a deer. But the first deer I shot with them was at 75 yards and the bullet blew up. The deer fell over and never twitched, I thought great. When I butchered it there were lead fragments all over the place. I had to throw away a lot of the meat. Could not risk feeding lead to my kids. So now I have to spend even more on ammo for the peace of mind. Or I could, and will, just take my 25-06!