I have a Bench Source and have found the time varies with different brands and also
different lots of brass. Get the proper Tempilaq temperature sensing paints and use
that to determine time.
Not a good answer but the best I can tell you.
It also depends on how close you have the torches to the case. I like to set the torches back and run it a second or so longer. It seems like I have better control that way.
