In my particular case it didn't matter what shells I ran through my full the modified patterned better. But honestly if you are after those high flying geese you'll want to get your hands on something such as Hevi-shot, its heavier than lead patterns great and hits hard. But it will definately hurt your back pocket. They do make some full choke tubes available for hevi-shot as well. I happen to have one of those as well for my 835 and it does hold a better pattern than my modified shooting the same hevi-shot loads. Good luck and have some fun though!