Thank you all.

Well, I was just wondering why nobody made them anymore.........given that 12ga components are well, as mass made as anything can be!

I have seen brass cases advertised for sale in fact......

The 12ga from hell has a 3.85" case! I was thinking of the old 12 bore elephant rifles, in their magnum guise.

Basically, I was thinking of something similar..........but maybe light nitro is necessary, as I DONT WANT '10,0000 ft lbs' etc.......was thinking of maybe 900gr at 1900fps as the topper. It would fire ball as well would it not?!

Ben