sentences:  In their original configuration, the guns had a rate of fire of one shot every three minutes, but after their refits in the early 1900s, the ships' loading equipment was modernized to improve the rate to one shot per minute.Ammunition magazines stored a total of 352 shells; these were projectiles that had a bursting charge.The "Brandenburg" class's secondary armament initially consisted of six SK L/35 quick-firing guns in individual casemates arranged in an armored battery below the forward superstructure.