Hey, guys i have a simmons pro 50 plus scope a friend ask me to help him operate, I have searched the Web but can not find instructions on how to set. It apears to have a range finder crosshair and yardage dial on top. If anyone has used this model of scope i would appreciate some info. I cant tell by viewing in the scope and turning the top dial weather its making adjustments. Its the 4X12X50 with A/O, Thanks.., And on the dial to adjust the power it has a odd code stamped D E A and each power has a coresponding yardage assiated with each D E A pattern? Go figure! HELP !!