How far will Zero or 20 M.O.A. allow me to shoot?
Zero M.O.A. is generally used for shooting 0 – 600 Yards depending on your scope and caliber
20 M.O.A. is generally used for shooting 600 – 1000 + yards depending on your scope and caliber
At 100 yards, one M.O.A. is about 1" (slightly more).
The scope mount cants downward at 20 M.O.A., which will allow you to zero your gun at a greater distance.
At 600 yards, a 20 M.O.A mount will point the scope down .120” or point the barrel up depending on your perspective.
One M.O.A. = 1" at 100 yards or 6 inches at 600 yards. 20 M.O.A. = 200 inches at 1000 yards.
For Example:
At 650 yards with a .308, with your scope centered (middle of adjustment), a 20 M.O.A. mount will be right on.