a guy gave me a DVD on Magpul's dynamic shotgun--to get me into a mindset before I decide to purchase a shotgun for personal defense, There was some real helpful suggestion for four loadings. If you were in Boise I'd loan it out to you---but--- I did settle on a FN-SLP-MK1 after talking with military and law personnel.
They liked the way it seems to resist malfunctions in times of extreme rapid fire (8-9 rounds under two seconds) However there was a bunch of recommended refinements to make to the weapon which are underway as I prep for a week at Front Sight. Good luck and good shooting.