I got the Nikon M-308 4-16x42mm w/ BDC 800. Turrets are kinda fat, but they work well, and the image is very clear for the price. The mag ring is a bit stiff, but not so much as to make me pass up what I felt was a fair deal. I like the 16x top end too. I was concerned the ocular piece would not clear the bolt, but it fits perfect with the rings that came on the gun. (El-cheapo 3x9 going on my daughter's 10/22.) I mounted it as far back as I could due to the long action, (haven't got a one piece rail yet) and the eye relief was "spot on". Didn't expect that, but very happy. I got it used, (the guy said very little) but in absolutely perfect shape, with the box, all the factory papers, scope caps (the rear cover is thick, and touches the bolt, but does not keep it from operating) and ARD for $325.

It will be interesting to see how it shoots with the "spot on" software Nikon has for your smart phone.