Here's the Leupold Cust Service response to my question of why the different HD reticles:
It's because of the range estimation feature that most of the VX3 scopes have. The yardage markings on the power selector ring have to correlate correctly with the spacing of the posts on the duplex reticle.
The 1.5X5 doesn't have the range estimation feature, and the 1.75X6 does. But if the range estimation feature isn't something you are using, we can put the 1.5X5 duplex it the scope for you. There is a charge though of $59.99 which includes your return shipping and handling.
