I think that you are talking about Bushnell's so called "3-2-1" low light reticle. This type of reticle does have steps just like you mentioned, hence forth the "3-2-1." As far as holdover, I'm not sure. In any event, I'm personally just not very interesting in this type of reticle. Try to go to bushell.com and see if you can find this reticle. If not, then get a free catalog like I did - you'll see it in there.
Zachary