I will say also that I have a Delta Stryker 4.5-30, and had an SWFA 5-20 HD before it as well as some other optics that topped out at 25x. Being able to go to 27x-30x is actually a really nice increase in magnification over 25x. I think with a 56mm objective, anything over 30x would make for a really tight eyebox. But up to 30x on my Stryker is just fantastic glass and I've used the 5-25 ATACR enough to believe that the 7-35 glass at 30x would be a really nice feature on a scope for me. The ZCO going to 27x is a nice middle ground between 25x and 30x. For my shooting, except when mirage is bad, the extra mag really is a noticeable bonus.