I've used Eo Techs on AR's and can group almost as well with them at 100 meters as a scope that will crank up to 7x or 9x. At 200 not as well, and at 300 the EoTech's are at about the max for good grouping. Probably a little further if shooting at a man or deer size target. My eyes are not so good anymore(55 years old) so I need some more magnification than the EoTechs can provide. I switched to a Trijicon Acog 4x on the AR and can now shoot good groups to 500- 600 meters. But they are $1100 to $1500, depending on the model. I would have been good putting a 2.5x or 2.75x on my Gunsite Scout if I was only going to shoot big game, but wanted to shoot paper and steel out to 500 or 600 during the off season. I decided on a Leatherwood Hi-Lux 2-7x Scout scope. Read good reviews from Midway customers, also google the Scout scope review by Dave Fortier. He liked the Leatherwood variable, in many ways more so than the Leupold 1.5x-4.5x that cost nearly 4 times as much. Mine is bright and clear. Light weight, 13 oz., only the Burris is lighter. Yes I know it is made in China, but good reviews, a lifetime warranty, and the 7x magnification swayed me. Cost was $125 from Midway and free shipping when I bought mine a couple months ago. I used Tactical Solutions Q.R. rings ( $40) which appear to be identical to Warne's Q.R. rings except they are aluminum instead of steel. I had to mount it all the way back to get a full sight picture, so wish it had a tad more eye relief, but Fortier found the the Custom shop Leupold to be even worse in this respect, he said anything beyond 1.8x with the Leupold and he had a dark ring around the edge of the sight picture, and it was mounted all the way back as well.