I know you didn't actually ask what I am about to answer and this rankles some who want us to stick to the subject matter but based on my limited experience with firing blanks and maintaining LMG's..................

Where there's a will, there's usually a simple way. And there is! Forget all about wood bulletted blanks and just get a couple of easily and readily available Bren magazines adapted to take and reliably (?) feed the standard rifle (and Vickers incidentally.....) short nose blanks. Then instead of knocking seven bells out of the bulletted blank 'masher' barrel, just get a shot-out standard barrel and modify it as per the simple 7.62mm blank way, the way we used to modify ours - and away you go. Reliably blaze away all day

On the other hand if you get some long nose blanks, you 'll pay through the nose for them but save the cost of the £25 or so 'shortie-blank' magazine.

Just my 2c's worth for what it's worth - or not!
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