I still say this is the easier solution...
with the center illuminated section shaped like this...
Would be WAY faster to implement, not be caliber specific, be just as fast as the triangle or chevron for up close use due to the large illuminated area, and just all around kick ass! In greeen of course. Just fill in the lines between the first mildots with illumination...
It would give a center aiming point of 50/200, the first mildot would be almost exactly 300 at the top of the dot and the second mildot would be almost exaclty 400 at the bottom of the dot with heavy match ammo. People with various ammo types and barrel lengths could just use the top of the mildot, middle of the mildot or bottom of the mildot to refine the aiming point off the first two dots and know their own ranges for those dots or for other begingin aiming point like a 100 yard zero etc. Other mildots would be used far less frequently but still have a usable range like 550 yards for the third dot or whatever... and honestly how often do you guys use a 4X scope beyond 400 yards anyway? And for those who would say the mildot covers too much of the target you could just find out what range the intersection of the top of the mildot and crosshair produces... then your actual aiming point is only covered below the point of aim. To be even finer little hashes every half mil and at the mil marks could be used vs dots. A universal BDC/mildot just makes more sense IMO and appeaals to a larger audience than a ONE caliber, ONE ammo type, ONE barrel length and ONE mounting height option.