not really its a different chip, different defaut speed, has more L3 cache so your base line is not the same as a 2500k so settings may not work as well for yours as they would a 2500k. Would be better off asking 2600k users what settings they use and there was a massive 2600k overclocking thread on here at one point.
Ok thanks for your help anyway, I'll have a look a older posts to see if I can find similar problems I'm having getting past 4.3, it may be the cpu's limit or motherboard. I raised the dynamic vcore last night, vcore was reading 1.416 in bios but still wouldn't boot in to windows.