wildcat

Evening all I was discussing what to do with a martini enfield with a ruined barrel today with my friend and gunsmith and he said he’d always thought about doing a wildcat using a .303 case blown out straight walled to .41. The more he talked about it the more interesting it sounded I know...

Good day all. I am looking for some cartridge and chamber dimensions Does anyone know where a could get a hold of the 500 a-square cartridge and chamber drawings? Thanks in advance

Snapped on the West Coast of South Africa.