I use the Vortex pst 6x24-50 sfp On my savage 308 with the milrad set up and have learned to range with it easily to 1000yrds. It also gives you a a multiplcation number on each x setting to go by, if your not zoomed to the 24x witch is nice when you need a wider point of view. I really like the glass and feel it is better than the 40mm pst's. also the reticle is very easy to see and calculate. I haven't used the illumination on it yet, but haven't had to. My 2cents
Monty