Milligan's two over par score of 73 left him in joint eighteenth place, five shots behind the leader Thomas Boulanger of France.
Other Ayrshire scores :-
78 - Alyx Murray (Troon Welbeck)
79 - Euan Ferguson (Turnberry), Sean Addie (Ayr Belleisle)
81 - Cameron Johnston (Troon Welbeck), Jack Broun (Ayr Belleisle)