The 6.5 cm round is finally starting grow on me a bit. We walked out the two LMT MWS guns (one 6.5, one .308) The 308 was handicapped with a shorter barrel and 168s... so not a fair fight, but the 6.5 got more first round hits all the way out.
I'm still a big fan of heavy bullets, and get much pleasure from rocking the steel hard. 6.5 cm just does not deliver that at all. At this point, I'd still pick .308. Pappabear picked 6.5 so he'd have a bolt gun in that caliber.