Has anyone here played around with this? It is basically a 444 Marlin blown out to a straightwall XXX Long 45 Colt for Contender and/or NEF 45/410 chambers.(not 410 full choke shot barrels) I have played around with it, and worked out a few kinks, & tried and discarded some of the 'myths' about fireforming. It really works. I havent used anything but mild loads so far, the weather has been pretty bad here.
I would love to hear from anyone that has any ideas for it. Robert