Mil / Mil vs MOA math check

[HarryN]

Hi, this is probably an overly simplistic question, but I am hoping that someone can double check my math and understanding.

In the MOA system:
- 1 MOA = 1 inch at 100 yards, so
- 1 MOA = 10 inches at 1,000 yards

Since many scope turrets are 1/4 MOA per click, this is 1/4 x 10 inches = 2.5 inches at 1,000 yards.

edit - Correction per ShtRdy - " 1 moa is actually 1.047 inches at 100 yards. That would be 10.47 inches at 1000 yards. And 1/4 of that is 2.618 inches." - thanks

____________________

In the Mil method:
- 1 mil = 1 meter at 1,000 meters

Since many scope turrets are 0.1 mil per click, then:

0.1 mil x 1 meter = 10 cm

10 cm x 2.54 cm / inch = 2.54 inches

This is only 0.04 inches difference per click at 1000 meters?- (corrected, more like 1 inch at 1000 yards)

edit - Correction per ShyRdy - "for 1 mil, there are 3.6 inches at 100 yds or 36 inches at 1000 yards. So 0.1 mil at 1000 yds is 3.6 inches."



Is this calculation correct, or what am I missing? - edit - Thanks everyone for the corrections.

Still surprisingly close (1 inch difference) at 1000 yards. That is far closer to each other than my current skills.

Thanks

Harry

 

[ShtrRdy]

One little detail, ( well maybe a couple little details) - one of your calculation uses meters and the other uses yards.

In the case of mils, for 1 mil, there are 3.6 inches at 100 yds or 36 inches at 1000 yards. So 0.1 mil at 1000 yds is 3.6 inches.

The other little detail is that 1 moa is actually 1.047 inches at 100 yards. That would be 10.47 inches at 1000 yards. And 1/4 of that is 2.618 inches.

 

[B-P-UU]

Units.. meters vs. Yards. Try not to think in lineal measures.. use your reticle as a ruler and adjust accordingly. This is why matching turrets and reticle are important.
A Mil is 1/100 of anything.. the best explination I've heard is "A Mil is 1 LeBron James at 1000 LeBron James'" to keep you from thinking inches yards meters, etc.

But back to your question.. 1 Mil is 1 yard at 1000 yards; i.e., 36".. and 0.1 Mil adjustments would be 1/10th of that (3.6" at 1000 yds). MOA is finer adjustments.

 

[treillw]

Also noticed a math error, for what it's worth. 10 cm x 1"/2.54cm = 3.93"

You want the units you're working with to cancel. Ie cm x in / cm leaves you with units of inches.

 

[Mikecr]

Keep in mind also that generalizations (like dismissing .047 IPHY) add up to way bigger errors as you dial ~30-50MOA. So it won't actually be just .47" off at 1kyd (that was only for 1moa dialed).
Also keep in mind that few scopes actually dial in true MOA, until tested and proven so. Either the scopemakers themselves don't know the difference between true MOA and IPHY, or they know but figure we don't.
I've tested Leupold Mk4s, and they are true MOA, NF NXS were not, non-Mk4 Leupolds (Vx-IIIs) also were not as they were in IPHY(which is fine, literally).