Saddling yourself with cheap glass is a good way to limit your abilities because of the issues inherent with them . Its not optical quality that is the number one criteria its the accuracy and repeatability of the adjustments . If the scope does not track properly or more importantly repeatedly it will cause issues with shot placement . These issues are more often than not dismissed as shooter error when it really is an equipment issue .

It is always a good idea to buy the highest quality equipment that you can given circumstances whether it be firearms or tools or what not . Can't say I've heard someone say that they were disappointed in the performance of quality equipment but I sure have heard people grouching about be let down by " cheap " stuff all the time .

Driving a precision rifle is all about constancy and repeatability , if the most important part in that equation , the sighting system , is neither the results will suffer .