Yes Iron Wire is the most advanced Hung Gar Form.
At the school that I train at, we have a form that is dynamic tension all the way through. This is the first form that a beginner to the style will learn at our school. It has no traditional name or anything as it is not a traditional form.
Anywho it sounds similar to what you are saying. You start off in Ki Ya Man, bring your right arm up to your shoulder and over to your chest, then slowly push forward with dynamic tension. Repeat with the left arm and then some other stuff...etc etc
If that is similar to what you are describing then we call that form "Part 1". Yup, the name is not very chinese or anything, but who cares right As long as it does the trick
