It left Wendover on June 8, 1945 for Tinian and arrived June 14. It was originally assigned the victor number 4 but on August 1 was given the large 'A' tail markings of the 497th Bomb Group as a security measure and had its victor changed to 84 to avoid misidentification with actual 497th BG aircraft. It was named Some Punkins and its nose art applied after the atomic bomb missions. While a number of sources attribute the name to a 1930's comic strip, the nose art suggests a possible reference to the "pumpkin bomb" missions the 509th Composite Group flew as combat rehearsal for the atomic bomb operations.
While on Tinian it was used on 13 training and practice missions and five combat missions to drop pumpkin bombs on industrial targets on Toyama, Ōgaki, Shimoda, Yokkaichi, and Nagoya. Some Punkins was the only B-29 of the 393rd BS flown exclusively by its assigned crew on all operational missions.
In November 1945 it returned with the 509th to Roswell Army Air Field, New Mexico. On March 1, 1946, while at Kirtland Army Air Field in preparation for assignment to Operation Crossroads, it was struck while parked by a taxiing B-29, incurring severe damage to its forward fuselage. The airplane was transferred to the 428th Base Unit at Kirtland in April 1946 and declared damaged beyond economical repair. In August it was deliberately set afire as part of firefighting training and totally destroyed.