Originally Posted by emjunkin
I am having trouble understanding at what rate the moa marks change with different magnifications.
It's not as hard as it may look, I promise. Very simple for ranging and holdover.
On 22X, the vertical spacing between marks should be 2 MOA. Horizontal should be 5 MOA.
On 11X, those same brackets will now cover twice the area. 4 MOA vertical, and 10 MOA horizontal.
On 5.5X, the spacing will be 8 vertical, 20 horizontal.
S/M=D..............size of target / moa covered in scope = distance to target
MxD=S.............moa covered in scope x distance to target = size of target
C/D=M...........correction needed at distance/same distance = moa to hold high. This one works for wind too.
Example: Rangefinder batteries died. Deer measure about 20" back to belly, you see a deer that covers 4 moa in the scope. So, 20/4=5............deer is approx 500 yds away.
Example 2: You know the distance to same deer is 500 yds from your laser rangefinder, but you don't know how tall his rack is. His rack covers 4 moa in scope. So, 5X4=20.............deer's rack is approx 20 inches tall.
Example3: You know that the 15 mph wind is going to blow your bullet off 25" at 500 yds. So, 25/5=5............you need to hold 5moa into the wind to hit the deer with the 20" rack at 500 yds. You've done all this without dialing a single knob on the scope.
Hope this helped.