So, what is that with a MIL dot reticle and 1/4 MOA turrets? What is hte math formula? Distance between dots, etc get to inches, etc. Right now I guesstimate and see where the bullets hit and when it gets where I want - stop. Not very easy to do on the fly and hoping what I am shooting at stays put till I hit it....
This should help: provided aggravation is tolerated.
A mil dot scope if 1st FP or a 2nd FP set at a magnification to represent true mrad values can be used to estimate ranges if the size of an object is known. 18 inches is a common size object.
to estimate range or R = (target size in inches/36) * 1000 / mils = R
for example: an 18 inch diameter wheel of an abandoned farm vehicle spans the mid point dots having a 1 mil separation (the distance between dot centers), so
range = (18/36) * 1000 / 1 = 500 yards
a 16 inch distance between strands of a 3 wire barbed wire fence spans .8 mils (the distance between dot edges)
range = (16/36) *1000 /.8 = 555.55... or 556 yards
one dot exactly covers a 1 inch T post (one dot having a .2 mil span)
range = (1/36) * 1000/.2 = 138.888.. or 139 yards
Having a MOA scope with 1/4 MOA clicks entails some math, a nice little folding pocket calculator is a real big asset.
1 MOA at 100 yards = 1.047.... or 1.047 inches, 1 mrad at 100 = 3.6 inches
3.6 / 1.047 = 3.438 moa = 3.6 inches at 100
An ideal situation being shooting rock chucks at 500 yards with the 130 H ELDM bullet at 2980 fps.
The rock chuck is resting on top of a pile of half rotted boards next to an abandoned farm trailer having wheels 18 of diameter and these span the mil dots on your scope..
Range = range = (18/36) * 1000 / 1 = 500 yards
The range info sheet taped onto your rifle indicates a 6.6 MOA correction for a hit at 500, having a 200 yard zero. The click values on the scope are 1/4 MOA, 4 clicks per MOA, 6.6 * 4 = 26 clicks with 1 inch of daylight backline hold & vertical hold (head or tail end) up wind offset for wind velocity & direction.
should the MRAD reticle features be used to make the shot:
6.600 MOA up / 3.438 MOA per MRAD = 1.920 mrad up , go up 1 complete center to center interval & one center to dot edge interval with a little daylight.
I rather have a MRAD reticle matched with MRAD adjustments but you gotta use what you have.
