The guys I know who have owned .7mm rifles, don't own 'em any more! They claim that the punishment from shooting those guns wasn't worth the minimal rewards. I'm a fan of the .308 and own two rifles in that chambering. I've killed more deer with those rifles than a lot of folks I know who shoot other cartridges, and most of the deer I kill are anywhere from 35 yards to slightly over 200, with most being 80 to 100 yards away. Also, most of the deer I kill are shot in the neck using Winchester SuperX 150 grain power point ammo.
If you plan to do long range shooting at animals such as Moose, or Elk, then I'd suggest going with a .300 or even a .300WSM rather than the .7MM. You'll get just as good results, have just as many bullet weights and options, and won't need shoulder surgery at a later date! BTW, I also own a couple of .270s, a .30-06, and a .300WSM, but my preferred rifle to hunt deer with is my T/C Encore .308, my second choice is my Ruger Mark VII, also in .308.
NRA LM, NAHC LM, Buckmasters LM, The Second Amendment Foundation, GOA, NAGR, Palmetto Gun Rights, , ASAdisabled sportsmens' alliance, EDH, and Proud SC redneck REBEL still flying the Stars and Bars!