Re: Conversion from mil-dot to MOA on IOR MP-8
I probably do this once a week, but there is a lot of fog in the air about Mil Dots, but hopefully this will help.
The WERM formula is as follows:
Height of target (yards) x 1000
-------------------------------- = Range(Yds)
Height Target (Mils)
So if your target is 72" and the Mils is 4, your range is 500 yards. (As Rush says, for those of you in RIO LINDA, 72" is exactly 2 yards!)
or if your target is 36" and your mils is 3,
your range is 333 yards.
1 yard x 1000
------------- = 333 yards
or if your target is 18" and your mils are 2, your range is 250 yards.
Now a slight variation on this which generally requires a calculator is
Height target (in)x 27.7
------------------------ = Range (yds)
or you can round off to 30 and do the calculation in your head.
I have found however, that the formula for target height in yards is the easiest to use.
That 3.3... jazz just confuses the issue.
(Note: If you are a Prairie Dog shooter, and your target is 9" tall, and you see 2.5 mils, your range is .25x1000/2.5=100 yards! [img]images/icons/smile.gif[/img])
PS: Now that you know the range you need to adjust your knobs for the hold over. You just make you come up chart in MOA and dial that in with your knob.
Alternatively, you can make the come up chart in Mils and uses the dots for holdover, but that is a little more difficult. By the way, this is why you need a scope with accurate mil dots and/or accurate clicks.
A come up chart might look something like this:
I can't help it, thats the way it is! [img]images/icons/grin.gif[/img]
[ 03-30-2004: Message edited by: DMCI ]
People slept peacefully in their beds at night only because rough men stood ready to do violence on their behalf. -- George Orwell
We honor and support those men and women who stand ready to do violence on behalf of the United States.