I have a rem sps in a .308 leupold 20 moa base and rings shooting federal match 168 gr (thinking about to switching to 175gr.Will be reloading in future ,no funds for equipment right now. Bushnell 4200 ffp 3x12. I zeroed at 100 yrds.I counted the elevation clicks.There's 170 up clicks.What would that equate to in yrds .How far can I get with that?