S., I"ve been using one since they first came out. Love em! Built on the MONARCH platform these scopes are very clear and offer excellent light tranmission for early morning or late evening shooting. I've even unloaded a few rounds at Tx. hogs with just moonlight.
I have both the BDC 600 reticle and the Rapid Action Turret which is calibrated for the shooter to use a 55 gr. polymer tipped bullet at 3240 fps. M.V.
I have taken both scopes out to 600 yard on a couple of occasion's along with friends who were amazed they could connect on target at that distance. There is a new for 2012 M-223 4-16 as well, if you are looking for even more magnification?