I havent used my welder as of lately but I have a Hobart Handler 140 w/ gas. Believe I am using 0.030 wire. Here is a pic of the machine.
And here are some welds from project PITA before I got rid of her.
This is ground down mostly. Not the greatest but definitely penetrated.
I would have loved to go with a 220v welder but $$$ and lack of 220 in the garage limited this selection.