has anybody used the 3-12 nikon ar scope,say,on a 308. i like the weight,power range and have been pleased with the nikons i own. i am comparing them to the 4-16 monarch mildot for a new 308. the ar bdc is a bit different from the standard nikon bdc (which i don't like at all). 1" tube and SF are big wants. optics on ar vs monarch? i know the optics on leupold ar are abut same as vx 2 (got that form factory) so that is the meaning of my optical quality question. thanks for any input.