Thank you Frosty! I plan to add a sleeve in the near future. I really want to try forge welding for my first time soon too! Very excited! I will pull the burner nozzle further out and see if that helps. Also, I changed the mig tip to a 0.025, as suggested, which seems to be doing quite well. However, I came back in from forging about 5 minutes ago, because the burner is now sputtering. No matter the pressure, it sputters. It's losing heat, probably from sputtering, and it's taking much longer to heat the steel. I also noticed my propane tank has a little frost at the bottom. Tonight is a "cold night" here in Texas so maybe that attributed to the problems?? And for the record, cold here is 55°F. Oh how I miss the mountains!! Anywho, it didn't sputter at all yesterday and I ran it longer and it was the same temp outside, if that has anything to do with it.