In the scenario you outlined initially, consider a lever action such as the Marlin 336 in 35 Remington - good to 200 yards. I wouldn't worry about 400 yard shots as how often are you going to get such an opportunity that you won't be able to hunt closer? It is a fast handling rifle and hard hitting cartridge that is good for deer and any black bear you may meet. I use the same here in Alberta and have no problems with it.