[wrenchnride247]

I'm using a 110v 135 MIG from Hobart with .023 wire 75/25 mix. Try having more "stick out" on the wire out of the nozzle with the 220v. Practice on a scrap piece butted together with the clamps and start close with a tack weld. Then, start having more wire sticking out on the next tack and so on. You will find a length that puts just the right amount of heat/penetration that gives the best weld. On 20ga. and thinner you can really only tack to keep from blowing out or warping.