A few days ago I blogged about the new Scout Sniper Observation Telescope. I said it would use the Horus reticle. According to Allen, a Marine vet and analyst at The Columbia Group, The Marines will be using a standard Gen II Mil-Dot reticle, not the Horus reticle.
As Jay (jdun1911) said in the comments of the original post a grid is not a great idea for spotting.
Thanks to Allen for the correction.