Quote:
Originally Posted by
Stretch 
It doesn't have enough loft for you to hit consistently. The RBZ "4 iron" is 20 degrees, which just a few years ago would have been considered a strong 3 iron (norm was 21 degrees) and back in the 80s would have been a 2 iron. It's also too long for you to control at 39". Tom Wishon -- who is one of the most knowledgeable club makers and fitters out there -- talks about the "24/38 Rule", which states that very few average golfers can consistently hit any iron with a loft of 24 degrees or less or with a length of 38" or greater. Yours has both (as does your 5 iron!). You can keep toughing it out, or you can get another hybrid to fill that yardage gap. I'd suggest the latter.
I definitely agree that getting a hybrid will make contact easier. Way easier and more consistent.
As for your original question about ball placement, etc, should be a wider stance, ball 4 ish inches from the front foot, same swing, same effort as any other full swing. That, I believe, is the hardest part of hitting low irons. We know they should go far, but we don't trust the same swing to take it there, so we swing harder.