Mines doing good on the Tikka T3 Lite in 308. I have around 4 inches of eye relief. I wouldn't want it up on a heavy recoiler for sure. Seems like 18 power at 100 is best I can do for clear targets. Adjustable objective and ocular are adjusted ok. Haven't tried 20 power at any longer distances yet. 100 yard range has 200 ft tall bank behind it. Going next weekend to 600 yard range. That should tell the full story I guess. So far I love it. Been shooting at quarter sized shoot and see stick ons. Still better than the prostaff I had on it. I'm curious to try the bdc reticle using my reloads. Just using it for fun and paper right now. Going to put 2.5x10 Zeiss Conquest back on come hunting season. 6 power a little much in the hills and brush. Wish I had found it at your price. I would have bought 2 myself.