I don't have enough experience using high end optics to know the answer to this. On a multi caliber platform like the dta, ai or blaser r93 tac2 where you have the ability to change calibers while using one scope for every caliber, you have the ability to zero the rifle with each caliber and simply adjust the zeros for any caliber you choose to put on. Obviously having a scope with very easy to use very stop like the March scopes is highly desirable in a situation like this. I've also heard premiers system is very quick and easy. My question is, out of all the too glass makers, which ones have the easiest(tool less) and quickest to use zero stops. Specifically I'm looking at s&b 5-25, march 3-24, premier 5-25, kahles 6-24, luepold mark 8, and nightforce atacr and beast. Thanks