Wow thank`s a lot guys for the info keep it coming.I am looking at just running factory loads l mean l will hand load my own rounds here in Australia l use 55gn ADI 2207 powder with Remington 300gn hollow point not sure how quick they are coming out but they are a nice mild load l use them in my Marlin 1895 GBL guide gun.l have always been after a nice double and if l can make my own well awesome l have a great workshop and heaps of goodies , CNC mill etc.
But l am a very cautious person and will do as much research as possible before making any start on such a project.Today l have just received W.Ellis Browns book and l am already reading it so at the moment l will keep my eye out for a good donor shotgun.