Just purchased a Nikon Buckmaster 6-18 x 40 side focus in Nikoplex. I haven't had time to test it since it is 25 below the last few days and windy. I did give it a whirl off my countertop and bipod/ rear rest at a sign about 500 yards away. The adjustment seems good so far. I will keep people posted when I test it on my 300wsm at the range (only 200yards but it will have to do. I got it for 275 new!