Go into the gunsight app. Pull up the wirble. Push it's slider all the way to the right. Also use zoom, this graphics engine seems to need a bit.
All of the wirble views except Num_8, push them all the way up with Page UP and F10. The Num_8 push it up so their is a gap under the bottom of the verticle line maybe 1\4-1\3 of the glass. Then use a bit of zoom and toggle in and out of it when you shoot.
If your FOV is past 90, yeah you will not be able to see much of those white lines. I found the manual for that gunsight only this year and the reticle is thin white lines.
The range markers are there because a spotter would be dialing in the range while an analog fire control director moved the vertical line to give you your lead. That is part of the reason for those 10Mil dot.
Ranges I calibrated to for the wirbel:
1 - 1000yds
Small tick - 1200 yards
.5 - 1500yds
.7 - 1700yds or maximum range for that round in the game.
The Ostwind is setup the same except maximum game range is 2700yds.