I got out last weekend and worked at it some more. The 100 yard zero was pretty close at 3X and 9X magnification. I'm amazed at how my groups can shrink when I turn the magnification down. My 3 shot group at 100 yards at 3X power was 0.75". Wish I could do that more than once.
I then shot my two BDC lines at 140yds and 175yds and they were right on. I moved the target out to 195yds and the group was 4-5" lower than the 2nd BDC line. When I get a chance to shoot it farther, I'll try to figure out the distance that corresponds to the vertical post.
To finish the shooting, I pulled targets into 50 and 75 yards and turned the magnification down to 3X. Both distances were 2-3" high.
I made up a little card showing that information and the DOA200 reticle. I printed out and taped to the stock of my Thunderbolt so I'll remember all this next year.
I was out Monday for the PA opener in a buck only WMU. There were plenty of doe feeding a couple fields away that were in range for the BDC lines. Saturday I can take a doe but I will set up closer to that field so I probably will not need the BDC lines unless they only come out in the far corner of that field.