Rimfire Central Firearm Forum banner

What is a "30/30" reticle?

22K views 3 replies 3 participants last post by  mikem 
#1 ·
What is a "30/30" reticle and what does the "30/30" designate?
 
#3 · (Edited)
As the previous poster said, the 30/30 reticle is a duplex reticle. A duplex has a thicker outer hairs and finer inner fairs. Leupold is credited with the first duplex design. When the other manufactures jumped on board, they became interested in creating a duplex that could assist hunters in determining distances to deer.

The most common scope at the time was the 4X fixed scope. Hence the definition of a 30/30 reticle is at 4X power, the total distance of the INNER duplex crosshairs is 30 inches at 100 yards. Since there are TWO intersecting crosshairs, the name 30/30 is used to designated that both INNER vertical and horizontal crosshairs are 30 inches at 100 yards. As I said before, it is primarily used for range estimation for deer. Some people suggest a deer shoulder to bottom is in the 15-18 inch range. Others suggest that deer shoulder to ground is in the 32 - 40 inch range, although most do not like to measure it this way, as deer may be standing in tall grass, making ground estimate difficult. Other try measuring body lengthwise, but I'm not sure what dimensional point they are using.

Many reticles use 30/30 ratio. For example the Weaver varminter reticle is a 30/30 ratio type, even thought the Weaver V24 lowest power is 6X (20 inches at 6X)!

The Clearidge RM 3-9X32mm AO scope with the duplex dot is a 30/30 design.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top