Thought you guys might like this. I recently picked up a Phone Skope for my Samsung Galaxy S4. Here is a video of a 970 yard 3 shot group through a Swarovski 20-60x80mm spotting scope. That rock is 36" wide and from what I can tell from the video looks like a 3 or 4 inch group. 243, 20" barrel, 105 grain Berger at 2850fps. Turn up the quality to 1080 and go full screen. I think the Phone Skope is pretty sweet product.
https://www.youtube.com/watch?v=NGO3LYveSAo&noredirect=1
https://www.youtube.com/watch?v=NGO3LYveSAo&noredirect=1