I'm using a .565" non ported, gives me what I wanted. Tried a .555", and it certainly did give a "hot core" to the pattern. My own opinion, a .555" will work great with an aiming devise on your shotgun, I use a Burris FF III with a 3MOA dot.
It isn't what happens to you that defines you, it's what you DO about what happens to you that defines you!
