Last year I saw a herters 401 power mag on here for sale. I had never heard of that revolver or cartridge. I did a bunch of reading and finally one came up for sale, its mine now and I would like to talk to other 401 owners for some tips or tricks so I can get out and shoot this thing. I know Im going to be making my own cartidges some say 30-30 some say 41 mag Im leaning toward 41 mag. Saw a post were they were forming with a 10mm die and then doing the rim? The RCBS forming set is for 30-30 and real exspensive. Shoot me a PM if you shoot the 410 power mag. and thanks in advance.