I recently attended a competition in Slovakia, one of the lads I travelled with was using a custom 6.5x47 that shot exceptionaly well. The wind was very unpredictable and on occasion moving my own 167 scenars a foot to the right (at 300 meters), the tiny 123 scenars my mate was using in the 6.5x47 were only moving 3-6 inches. Its flat shooting, uses mid weight bullets (low recoil) and uses small rifle primers (suposed to offer cleaner more consistant burn characteristics)
I think it would be a great deer round, (just behind 6.5x284) and yes, I have one being built for me too as we speak.
Here's a link to the rifle spec / build my mate was using: