In preparation for this year's Lynx Brutality, organised by @PolenarTactical in Slovenia, Bloke put a Holosun 503 on his famous Australian International Arms M10A1 "Frankenrifle" in 7.62x39 (a modernized Lee-Enfield based rifle) and took it out to 300m with some unconscionably expensive SAKO ammunition and a Holosun 503 red dot to see what it would do (and how high he had to aim when zeroed at 50m... What happened?