I've been using my HD-B's, set up with the micro SD card, for dialing up with a NF scope in .25 moa. I made a small cheat sheet converting .25 moa "clicks" to moa. Example 53 clicks = 13.25 moa. I then took the small cheat sheet to a local Kinko's and using their lamination machine and the luggage size lamination plastic, laminated the cheat sheet. I grabbed two of the luggage tag holders and was able to attach the laminated cheat sheet to my HD-B's. I'll post pics soon.
I just completed a mule deer hunt yesterday with a 257 Rob that had a Leupold 2.5-8 that had the Boone & Crocket reticle. That reticle uses a 200 yd zero, 300, 400, 450 and 500 yd yardage crosshairs. After reading the HD-B's instruction manual, I figured out what to do. Made up a Micro SD card for the rifle. The HD-B's will automatically use the SD data when inserted. You then set up the Ballistic Output for the HD-B's to "EHR", Equivalent Horizontal Range. What will happen is when you range, the program will take over and taking into account the yardage, baro pressure, temp and up/down angle, gives you and "adjusted" yardage to hold for. Example. The straight line distance might be 450 yds BUT due to the weather, the HD-B's might give you a 428 yd distance a second after it displays 450 yds. You then dial for 428 yds instead.
Hope this is clear as mud!
Alan