I am assuming that you are asking about comparing a 7mm Rem. Mag. to a 7mm/08 Rem? If that is the case, the 7mm/08 would be my choice. The 7mm Rem. Mag. is a fine round as well, don't get me wrong. But in my opinion way, way beyond what is needed for killing medium game at distances that most of us can manage. Besides it packs a pretty good whollop on the recoil end ! As already stated the choices of 7mm/08 Rem. factory ammo are somewhat limited. Not to muddy the water, but if you are strongly considering being a one rifle hunter, it'll be darned difficult to top the 30.06 Spr. This is a cartridge that has a long history of being great for all sorts of game, and the variety of factory ammo abounds.