I am sure this might be a dead horse, but I am new to the site. I have a Browning A-Bolt 300 Win Mag and need a scope to at least 800 yards. I like the CDS system but afraid of needing more. 800 yards is along shot for where I hunt, but I need l something from 200 to 800 yards; plus something that is fast and reliable. The elk dont stay in one spot too long. I am shooting the Federal Premium 180 gr Nosler Accubond bullets. Plus I am really fond of the Leupold scopes. Your help is very appreicaited.