During the Interim Peace Finland began constructing Salpa Line to fortify the new border to replace Mannerheim Line fortifications. Salpa Line artillery included six 152/45 C guns. In the Continuation War 152/45 C was involved in the fighting again and several guns were lost to barrel explosions or simply worn out. Some guns lost in the Winter War were recaptured bringing the total to 78 pieces in 1943. By 1 May 1944 the number had dropped to 60. During World War II 152/45 C guns were also used as anti-aircraft guns. The guns, designed originally before aircraft had been invented, were not especially effective in this role even after the modifications that had been done. Despite the limitations they were used against enemy bomber formations, especially in the defense of Helsinki and also against fighters. Finland also used 152/45 C guns as railway guns. The first trials with a 152/45 C gun mounted in a railway wagon in Finland was performed in 1924 and the gun was given the designation of 152/45 CRaut. Winter War mobilization plans called for two gun railway battery, but due to equipment problems only a single gun was available for most of the war. In Continuation War the battery was expanded to four guns. On 21.9.1941 the battery was renamed as 2nd railway battery after 1st railway battery had been formed from captured Soviet 180 mm railway guns. The battery was disbanded and the guns removed from the railway wagons after the war, but the plans for re-forming it remained in place. In 1962 there were three guns reserved for forming a railway artillery battery.