Re: meassuring scope height?
If you want to get crazy, take the rifle out of the stock and measure from the bottom of the barrel shank, just in front of the action, to the top of the scope tube or objective. Then measure the diameter of the shank and the diameter of the scope tube or end bell (whichever you measured from before). Subtract 1/2 of both diameters from your first measurement and you're there.