Best .308 Riflescope for the money??
I cannot say about these ballistic calibrated scopes as to how good they are and whether or not they are better than knowing how to use and correctly using a true-mil-dot scope. Burris for example makes a couple of nice scopes, the name is actually confusing with Military-Dot Ballistic Reticle in it but its got a ballistic reticle set up for the .308. Its either mil-dot or ballistic reticle in these not both, you can only have one or the other and tballistic reticles are only calibrated at one magnfication, from what I have seen on the 6X20X50mm for example the ballistic reticle is calibrated for bullet drop of a .308 at 14X not 20X. Changing magnification on these scopes will cause errors in the readings unless you are good at math on the fly and can apply that to the reticle spacing.
Tasco makes the Super Sniper scopes which I have actually seen with a true mil-dot, the focus ring is in the rear where the zoom ring would be because there is no zoom. Making it easy to access and adjust for fine focus. You would have to select either the 10X, 16X or 20X. I myself would prefer the 16X for most usages up to 500 yards. These scopes are only $300 but from what I have seen so far they appear to be worth it. They are clear, rugged and bright, you can do precise zeroing on your target with true military type turrets.
If you have the bucks to spend on a quality Valdala unit and you truly are going to just use it for target shooting, I would get a fixed 16 power scope with the mil-dots and learn how to use them. When you are shooting at 500 yards and the wind is blowing across at 15 mph and you can dial in 10.75 MOA elevation exactly and 7.5moa windage (175grn bullet muzzle velocity of 2635 fps, b/c of 0.495, for example only) and smack that target you will be glad you didn't go with a 6X scope
There is www.shooterready.com which will give you a free demo version download of their software on how to use the mil-dot scopes acurately if you are not already familiar of what they do. With a good ballistic chart for the ammo type you are using and the knowlege of target size you can be very effective with a mil-dot scope rather than the ballistic reticles of a specialty scope that cannot be switched to another caliber rifle. But I will be honest and cannot say that the ballistic reticle scope would not work better for that given caliber, never used one. Good luck.