It seems an awful lot of shotgun issues occur when using Win White Box target loads - this ammo is simply not very good for anything beyond plinking. It reminds me of the 40 grain varmint 223 they used to sell cheap, it worked fine in bolt guns, but guys would try to use it in AR's and have problems. Simply put, if you're going to use a shotgun for SHTF, stock up on something other than WWB, you can't bet your life on it, in anything other than a single, or double.