The main problem here that I see is what we call 'the twilight zone' where the round if not under control. That is neither controlled by the magazine or the chamber. That spells bad news and the perfect recipe for a jam. That;s the very reason for the major difficulties/problems converting the Bren to 76.62mm and the reason why the magazine has to be moved so far forwards. And it was this that caused the major head and heartaches. It was finally cured in a novel way........................ And not be creating a 'twilight zone'