I think that 1-4 would be a mistake for a mountain rifle. Sure it would weigh a few ounces less than something with a higher power range, but in my experience mountain hunting, elk and deer can be at short range or out in the open. I built up a light weight 7mm RM and it wore a 2.5-8x36 Leupold and it was okay, just a little lacking in last light brightness and first and last light is pretty often when you see a shooter animal. Now that 7mm RM wears a Swarovski 30 mm 2.5-10x42 and it is perfect. A couple of ounces more than that Leupold, but the advantage in the extra brightness and resolving power make it ideal.
