Well yeah, but part of the sales pitch is the simplicity of using the Zeiss calculator and the power ring to adjust rapidly for a change in load parameters. ie: I got 220 gr roundnoses in my left pocket for which I turn the power ring to 6.5x for example, and 165 boat tails in my right pocket for which I move the power ring to 8x (just an example) I guess I'm just ranting about "new and improved, because how often do we really need this feature? But, yes you're right, the scope is still useable with old fashioned calculations.
SFP drop reticles are pretty amazing, but its really amazing that you have the same poi=poa for windage with two different loads
