I have one on my Rem cdl sf in 270 wsm. I have always used burris and think for the money they are extremely underrated and their customer service is second to none. The glass is clear as always. I got the custom turrent calibrated for my deer load(Sierra 140 gr. Gameking SBT). The turrent is right on out to 600 yrds, have actually shot it that far. I would recommend it to anyone. I plan on having them make me a custom turrent for by fullfield II, which is the same one they use for the C4. I found it the cheapest on black bear sporting goods website($349).