The only reason I suggest oiling the cases Joe is to eliminate a couple of problems that have arisen. The first is that the brass cases sticking in the chamber indicate to me bad (or marginal) P-Ext and/or a badly reamered chamber where the softer but more pliable case will expand into the reamering marks and cause the sticking.

I feel that if the contributors were to sit around a table, we'd have thgis solkved in an hour, But a semi auto new-made Bren is all very new to me and I am truly grateful for the time and instruction everyone has passed on.

I've also learned something else too........... As a rule I look at weapon orientated problems and things as an Armourer with an eye to my Mechanical Engineer qualifications/way of thinking. With this, I've learned to do the opposite. Look at it as a Mechanical Engineer but with an Armourers hat on!