▁su pers eded ▁by ▁the ▁new ▁generation ▁of ▁rif led ▁m uzz le - loading ▁guns ▁in ▁the ▁ 1 8 6 0 s , ▁and ▁ 6 5 ▁c wt ▁versions ▁were ▁converted ▁to ▁R ML ▁ 6 4 ▁p ound er ▁ 7 1 ▁c wt ▁guns ▁via ▁P all iser ' s ▁method . ▁ ▁See ▁also ▁List ▁of ▁naval ▁guns ▁ ▁Sur v iving ▁examples ▁▁▁ 6 5 ▁c wt ▁gun ▁at ▁Fort ▁Den ison , ▁Sydney , ▁Australia ▁▁ 6 5 ▁c wt ▁gun ▁at ▁P end ennis ▁Castle , ▁Corn wall , ▁UK ▁Two ▁ 6 5 c wt ▁guns ▁at ▁the ▁British ▁Res iden cy , ▁L uck now , ▁India ▁ ▁Notes ▁and ▁references ▁ ▁Bibli ography ▁General ▁Sir ▁Howard ▁Douglas , ▁" A ▁Tre at ise ▁on ▁Naval ▁G unn ery ". ▁Fif th ▁edition , ▁re vised . ▁published ▁by ▁John ▁Murray , ▁London , ▁ 1 8 6 0 ▁Lieutenant - Col onel ▁C ▁H ▁O wen ▁R . A ., ▁" The ▁principles ▁and ▁practice ▁of ▁modern ▁art illery ". ▁published ▁by ▁John ▁Murray , ▁London , ▁ 1 8 7 3 ▁ ▁Further ▁reading ▁ ▁Tre at ise ▁on ▁the ▁construction ▁and ▁manufact ure ▁of ▁ord n ance ▁in ▁the ▁British ▁service . ▁War ▁Office , ▁UK , ▁ 1 8 7 7 ▁ ▁External ▁links ▁ ▁Category : N aval ▁guns ▁of ▁the ▁United ▁Kingdom ▁Category : 2 0 3 ▁mm ▁art illery ▁Category : V ict or ian