Re: 1000 yard 7mm mag
I have a 7RM Savage with a Nightforce. My shooting buddy has a Zeiss. I have no idea as to how much elevation adjustment the Zeiss has, but I would imagine it has plenty to get you to the 1000 mark.
As far as the caliber goes, you won't be disappointed.
Just beware, once you hit the gong at a grand, you will get the fever.