I am thinking about a similar cheap fun gun project, cape gun from one of the many easy to get 16 ga sauer& sohn guns around here. thank gods there are also a lot of them with suhl claw mount and scope, old slug guns that nobody like anymore.

the 45/120 have a lot of potential, willy mintert in germany http://www.wm-bullets.de/ makes a CIP proofed load with a 485 grains hard cast gas check bullets and 588 m/sec- 5434 joule in horneber brass. thats brings the old lady in the class of the 9,3x64 brennecke but the 9,3mm bullet have a better sectional density of course. the 45/120 have a max pressure of 2200 bar and this load and the other in mintert reloading book I show are under this .the proof house in mellrichstadt germany have a pressure test barrel http://www.lmg-bayern.de/index.php?optio...er&Itemid=1, reamers are available and the die set is a realy cheap one, thanks to the cowboy action shooters. asking myself whats possible with a 400 grains softpoint in the 2200 bar pressure max.