I went and bought 10# of 6010 the other day for some logging stuff we are doing. Lincoln SA 200. I ran a 1/8" rod at about 120 amps, and it just about vaporized. Kept backing down, and ran it nearly at minimum for that machine, which would be at about 80 amps, iirc. Then, I got out some 7018, not liking what I saw. I had to crank up the 7018 into the next heat range so that I could get an acceptably large enough puddle without the filler appearing convex.
Maybe I need to get the machine checked for out put and performance?