Unless you're regularly shooting big deer at long ranges go with the 30.06 (or smaller 6.5 / 7mm calibre). Don't get me wrong, 300wm is a great calibre, quick, hits hard and accomodates bullet weights from 150 to 200+ (I have a 220grn eld-x load for mine) so very versitile, top it with an aimpoint red dot and it's a formidable driven boar rifle, scope it up and your almost point and shoot on deer to 300yrds +. That said, flinging a 180grn bullet at over 3000fps comes at a cost in terms of recoil, barrel life and powder / ammo costs....alot suggest downloading to 308/3006 speeds but it doesn't really work, to achieve that it's easier just to buy the 308/3006 in the first place. Should you get a 300wm....definately....but with a 25.06 for fox/roe and a 300wm for the other end of the spectrum I'd personally be looking for something to sit between the two.....6.5x55, Creedmoor, 7mm-08, 7x57, 7x64, .270w, 280rem, 308w or the 3006.....take your pick.