Going back 2 the Bren. Ig u switch 2 the semi-auto and use it like the Garand-hip firing u can pretty much hit accurately even if not sure 100% about your target. I use it so that i roughly aim with iron-sights and the target alone comes in the bullets way.
But as 2 using it often - NOT. BUT I had several rounds with 20-30 kills only using Bren. None the less u should be using it as support weapon for pinning squads/suppression. Tried aiming/firing practice with a colleague and he said the bullets were mainly flying in a circle of 1m2. But on full auto we all know how it performed.