 At maximum elevation, the guns had a range of around with SBC; later a charge of of cordite was substituted for the SBC which extended the range to about .There were significant delays in the production of the heavy guns for this ship and her sisters, due to cracking in the innermost layer of the guns, that significantly delayed the delivery of these ships.The secondary armament of the Admirals consisted of six 26-calibre BL Mk IV guns on single mounts positioned on the upper deck amidships, three on each broadside.