621 yards is the farthest I have shot with this set up. I saw your post and was on my way out to shoot some groups with my Edge, so I grabbed my .243 and the tripod. Up until today the farthest I have shot with this set up was 500 yards at clay pigeons. I put a pigeon above my target and when I was done shooting I drove as far away as I could and still see the target. Swaro put me at 621 yards, so I dialed 10 MOA and let a 105 A-MAX fly. Saw my impact pigeon gone and still have not been able to wipe this grin off my face.
. I have no doubt that with a little trigger time to get used to the set up you could make hits to 900 yards.