She carried ammunition into the Pacific Ocean war zone and, on 20 December 1944 at Manus Island, New Guinea, she struck a naval mine and suffered a very large hole in her side.

Her ammunition did not explode due to the sudden inrush of seawater; however, her operations were somewhat limited after that event and post-war she returned to the United States for disposal by the Navy and a continued maritime career.

[3] On 17 October, the newly commissioned cargo ship sailed to San Francisco, California, to begin duty as an ammunition supply vessel.

[3] Kossol Passage ultimately proved to be unsuitable for ammunition handling owing to chronic heavy swells, the lack of storage facilities ashore, and the shortage of personnel to unload the supplies, as well as its proximity to Japanese-held Babelthuap Island.

Boulder Victory remained afloat, although low in the water; and, after emergency repairs to the engines, managed to get into Palau again on her own power.

Finally, on 13 June, Boulder Victory's temporary repairs made her seaworthy again, and she set course via Pearl Harbor for San Francisco.

[3] Boulder Victory was still in overhaul when the Japanese capitulated in August; but, on 1 September, the cargo ship began shakedown and training exercises off San Diego, California.

[5][6][7] In 1947 with her war and relief work done she was laid up in the Wilmington Group and later transferred to Suisun Bay as part of the National Defense Reserve Fleet.

[8] On 20 May 1957, American President Lines (APL) removed Boulder Victory so that the University of California could conduct thermal stress tests on her.