How deep into the clay did it go? What did the "wound" cavity look like, small straight hole or an ice cream cone? I prefer an ice cream cone style wound channel and about 12 to 14 inches of penetration. I cast my own and generally go for 12BHN in the revolvers. I would not scoff at YOUR results though. IF they are accurate in your gun, go with them. MY way of thinking is , I'd rather hit a bad guy with a NAIL than miss him with a 12 gauge slug!