I have gone with a 6.5x47 but specifically as a short barrelled woodland muntjac, roe and fallow rifle. Time will tell its real capabilities with regards to other species and terrain. For now, if I was after a 6.5mm all-rounder, I'd probably go 6.5x55 or for the hill, 6.5-06. I'm not a fan of the 6.5/.284 but many make it work well, There is always the 6.5x68 as well, however...