Alright I am only 20 but so far I have got two deer on the wall so I am not new to the hunting scene. That out of the way, I am looking for the ultimate all around, flat shooting hunting cartridge. My deer gun for a while was the good old .270 Win, and then two years ago I went to a 7mm Mag. I have my mind set on a Christensen Arms rifle on a 700 action. I don't plan on shooting grizzly bears or elephants. Hopefully Moose will be the biggest animal I will hunt for. My dream hunt is for bighorn sheep. I guess my question is, is my 7mm Mag good enough for NA game out to about 400 yards? Should I just put a Christensen barrel on it? Or should I upgrade to a .325 WSM or something. I really like my 7mm mag, it is a Ruger mark 1 with a bell&carlson synthetic stock.