Iv had one for a good couple of years now. When I first used it max was 600 yds but often struggled to reach 450.I sent it back to Leupold with very good results.700 yds is now easy off most vegetation with the best reading of 1100yds just on dark. The TBR I get readings out past 700. At 750 yds last week it was very close to mates leica 1200. Swithing the TBR on slows it down a bit.