I have an older Bushnell Sportview 4x12x40 with the Rangemaster system. I have no documentation of how to use. I called Bushnell SC and they did send me ScopeChief and Banner instructions, but the guy sounded like he nerver hered of a Sportview scope before. There was no info on how to reed the rangefinder scale- three sets of numbers on power ring or specks for the RM bullet drop turrents RM1,2,and3 that in there parts list are listed seperate from BDC turrents. Thanks if any one can help.