I don't Know if any Supernova users are aware of this,myself included....But it seems they are being sold and not proofed for HP steel shot use! i.e
No Fluer de Lys proof marks on the barrel,I know they are tested by Benelli to 1370 Bar,But apparently this is not HP proof test for the barrel! ...I thought this was a legal requirement in this country! Awaiting a reply from GMK