I have owned the 520, which I believe is the repeater version, for a few years in 6.5x284. It's the most accurate rifle I have ever owned. It has about 500 rounds through it and consistently shoots .25MOA or better measured at 500 yards. It has. 1:8 twist, cerrakote, #6, 26" barrel, synthetic stock w/ rollover cheekpiece, and brake. I have taken a couple of dozen deer, antelope, and coyotes between 600 and 1100 yards with this rifle It's a dream to shoot. I shoot 140 Berger VLD's at 2965 FPS. I have a Huskemaw
5x20 mounted on it.