 Complete the following phrase:  From the start of the modern biathlon in 1958 until 1965, international competitions were held exclusively using high power centerfire cartridges such as the .30-06 and 7.62 NATO. Fullbore biathlon was part of the Winter Olympic Games in 1960, 1964, 1968, 1972 and 1976. Fullbore World Championships were held from 