Quote Originally Posted by dgarnier View Post
is there any harm in having the gas too high?
Depending on the gas and metal, yes (porosity, just like atmospheric contamination) and no as the argon (inert) you an get away with more.

Always stay within the recommended ranges. If you have some air movement or need a longer stick-out you can add some more gas, but enough to get the job done.

Biggest problem you will have is your wallet though. It's gauge will be going down too