I've ran Dual Sheild wire in my 12vs powered by a Trailblazer 302 and it ran great. I just bought an older Millermatic 251MP and it doesn't seem to like it much. I tried to set the wire on the machine as .045 Steel and .045 fluxcore and it just does not like it. Does anyone have any tips for me to get this working with this machine? Thanks....