Since I was running the camera that day, I don't remember thinking that was undercut. Most likely just some residual slag that gives the appearance of undercut since the root was not wire wheeled . Camera angles and lighting can make a big difference.
thanks for the comment Brian,
jody
Replied on Short Circuit MIG Tips - 115V power on 11ga Steel
Nov 08 at 06:59 AM
I wouldn't say a lot compared to how much spatter you can get with settings that are really bad.
The clips where a push angle was used seem to have more spatter.