Todd Hodnett is in the process of making a video.
The wind dots (the porton below the horizontal cross hair)
are for any caliber but the wind speed reference is going to change based on caliber.
For instance;
.308 & .300 win mag are 4mph dots
5.56mm are 3 mph dots
.338 & .300 Norma are 5mph dots
As far as Density Altitude goes 4 mph at 9000' becomes 5mph
The + = 4th wind dot to aid in counting
Excerpt from e-mail.
"The reason I have the mil lines at different measurements is the fact that we use a mil reticle to measure things so I wanted different measurements in the reticle instead of all the measurements being the same. The reason I went 5 mils and started over was this way I don't have to count down or have numbers telling me what mil line I am on left and right.
The open space means you are in the speed mil-ing portion of the reticle and it is cleaned up for more refined mil-ing in these spots.
The cross is just the fourth wind dot and I did it this way so you don't have to count as well. These dot values change due to ballistic characteristics of the weapon and DA of your position. The kestrel will give you this number as will the dot calculator on the Horus web site. "
Hope this helps as I am still learning this reticle myself.
The wind dots (the porton below the horizontal cross hair)
are for any caliber but the wind speed reference is going to change based on caliber.
For instance;
.308 & .300 win mag are 4mph dots
5.56mm are 3 mph dots
.338 & .300 Norma are 5mph dots
As far as Density Altitude goes 4 mph at 9000' becomes 5mph
The + = 4th wind dot to aid in counting
Excerpt from e-mail.
"The reason I have the mil lines at different measurements is the fact that we use a mil reticle to measure things so I wanted different measurements in the reticle instead of all the measurements being the same. The reason I went 5 mils and started over was this way I don't have to count down or have numbers telling me what mil line I am on left and right.
The open space means you are in the speed mil-ing portion of the reticle and it is cleaned up for more refined mil-ing in these spots.
The cross is just the fourth wind dot and I did it this way so you don't have to count as well. These dot values change due to ballistic characteristics of the weapon and DA of your position. The kestrel will give you this number as will the dot calculator on the Horus web site. "
Hope this helps as I am still learning this reticle myself.