I have Optika6 4.5-27 and 5-30 on my 6.5 CM Bergara rifles. Amazing accuracy and repeatability. I have been a Bergara fan since they showed up and now with Meopta, I think I am getting all the accuracy possible out of my rifles.
I Will keep the Optika6's on these rifles just because of the added elevation adjustment I get from the 30mm tube.