In the senior Overseas match, Guernsey achieved its first victory in 2009 with a squad comprising a mixture of young cadet marksmen and established club shots. In 2024, Guernsey won the match for the second time, beating Australia, Canada and Jersey.

The island’s highest score in the match is 1236.155v ex 1260.252v, achieved in 2011. Nick Mace holds the highest individual score in the match, achieving a near-perfect 105.20v ex 105.21v in 2011.

As happened with the Mackinnon, past Guernsey teams often struggled to field a twelve-man team to compete in the senior Overseas match, and so instead entered the four-man junior match instead. From 1981 to 1991, Guernsey won the Junior Overseas eight times.

Team members during this period include Bob Courtney, Richard Perkins, Alan Le Page, Tommy Henry, Roger Rowe, Simon Stewart-Fry, Danny Yeadon, Mike Martel, Charles Trotter, Bob Cushing, Frank Le Maître, Ian Donaldson, and Nick Blampied.

However, following a complaint from a disgruntled overseas team, in the early 1990s, the NRA requested that Guernsey enter the Senior Overseas match, deciding that the island could shoot either the junior or senior versions of the big three matches, but not a mixture of both. A decision was taken to enter the senior matches, with the argument offered that entering the twelve-man senior matches would provide a greater number of young shootists with match experience and aid selection of Guernsey’s best eight-man team for the Kolapore.