From Internet Movie Firearms Database - Guns in Movies, TV and Video Games
Los 4 hunting rifle - 7.62х51mm
Los 7 hunting rifle - 7.62х51mm
Los 7-1 hunting rifle - .308Win
Los 9-1 hunting rifle - 9.3x64mm
Izhmash AVL target rifle - 7.62x54mmR "Extra". It was manufactured in 1972-1978 and used on shooting contests, including Olympic Games, until the rules changed and rifles were limited to small caliber only. Some AVLs are still used as hunting rifles though they are quit rare.