hey spanners,
I am of little help but am curious to know how what these 12*12*12*12 cases are also.
When I dissected a club 28 hull and a sp36 hull they were slightly different in the base wad as you made comment. The sp36 has a headstamp with 'Falcon 12g'.
I tried emailing the guys at Target Products NZ but haven't heard back. If I get a chance during the day I will ring them as BullTahr suggested.
Let us know how you go if I haven't got back with an answer.
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