砲口初速
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. These guns had recently been adapted by Krupp from existing guns to employ quick-firing technology. The guns were in MPL C/91 pivot mounts that allowed elevation to 30.3 degrees, for a maximum range of . Their rate of fire was theoretically 10 rounds per minute, but in practice it was limited to 7.5 shots per minute. Muzzle velocity was , though with the C/07 shells introduced in 1907, this increased to . During their modernization, another pair of guns was added and ammunition storage increased from 600 rounds to 1,184 shells, which were a mixture of armor piercing and high explosive (HE) rounds.