I have had this on my HMR for the last 2 years. However due to a house move I need to clear out anything of value (luckily my rifles were so cheap that she is not eyeing them up . Only cost £50. Not worth selling dear.)
This is the Boon & Crockett reticle. Basically set zero at 200 yards and then at the particular mag for your calibre you drop down 1 line for 300 yards and the next line for 400 yards.
Tried it once on the range and seemed to work. In my limited experience.
These are a good scope, they work well in the dusk and dawn areas and also work well with Night Vision. I have used this with an Archer with great success.
and it has side parallax as well
but up for sale now. £410 posted to normal uk addresses.