My next great idea is to load two .662 RB in a steel shot wad but I'm a bit worried about both the pressure and the recoil.
That would be a 52gm payload and that's probably a fair bit too much.
Anyone played with a load like that? The reason For it is that I can shoot a .662 RB through my extra full choke on my Baikal single shot, but I doubt foster slugs would be a good idea, this probably isn't either.