from what I understand is that there claiming it to be better for penetration because with it shooting a tighter pattern, you can shoot 5's instead of 6'a and 4's instead of 5's therefore giving you and advantage of 10 or 15 more yards. but it seems like yesterday they was claiming on Winchesters website that there was a penetration advantage of like 10% or something another without stating to drop down a shot size, it was more to do with that shot lock stuff. If that is true then that would be a HUGE claim. I cant get on there website right now for some reason to see if I am correct about that claim or not. it says there going to be about $20 bucks for a box of 10. that's like federals flight control wad turkey loads and hornady's. we'll just have to get some and try them out I guess. might be the best thing since toilet paper "in your particular shotgun"