6" is the barrel length limit for PPC and the front adjustable model is ok for the open class but not allowed for Disstinguished match.
Kshock have you thought about a 14-6 or 7 the k frame with and underlug they came with taller patridge sights on them some guys can shoot neckhold without changing the sights. They dont come around very often but can be found they are extremely accurate and the most popular model for distinguished because most of the open guns are k frames and the loaders and other ppc gear is interchangable. Just a thought,L frame is a bit heavier though.