The ship was laid down at Burntisland Shipbuilding Company's yard in Fife on 2 June 1943, and launched on 29 November 1943.

[1] Lock Killin along with the sloop Starling sank the German submarine U-333 on 31 July 1944 to the west of Land's End.

[2] In January and February 1945 Loch Killin was detached for service in the English Channel providing convoy escort and support for short periods, before the rest of 17 EG was transferred to Plymouth for support duty in the Channel in April.

[1] On 15 April 1945 Loch Killin sank U-1063 in the English Channel west of Land's End, in position 50°8′54″N 3°53′24″W / 50.14833°N 3.89000°W / 50.14833; -3.89000, with gunfire and depth charges.

[1] After her stores and supplies were removed Loch Killin was put into the Reserve on 7 November 1945 as a Category "B" vessel.