Do I need a 20 MOA base and will it mess up my Nikon BDC? I checked my scope and I only have one rotation of adjustment for the elevation. At 1/8th" clicks @ 100 yards that wouldn't get me very far out there I wouldn't imagine. It currently is zeroed at 200 yards. The scope is a Nikon Buckmaster 6x18x40 BDC. Right now I have a Ken Farrel one piece base. I wanted a 20 MOA but Sinclair's didn't have it in stock so I got the 0 MOA.

And also, if it's 1/8th inch at 100 yards then its 1/4" at 200. I got that part down but what does it move at 300, 400, 500 and 600? It's a little confusing and I'm new to long range shooting.

I've never used the elevation knob to get on a target at long range, I've allways just used holdover.

Thanks in advance.