When Palma made the 308 rifle to be used in 30 cal that end any competition on anything else being used.
Since it has no competition who's to say it's better? If it was the best why didn't US Palma scope the 308. Myself you put a lens which is available in power magnification in the front sight might as well scope the rifle then you add one of these
http://www.sinclairintl.com/optics/s...prod44975.aspx
Archery match shooters with sights can use a lens their 2x,4x,6x and 8x good ones are made by Swarovski and you can get different reticles but you can't hunt with them as their considered a scope on hand held bow. they also have matches that lens are not allowed.
I don't think it much about the 308 anymore but how far the rules and be changed.