I had one similar once that I bought to defend my sign shop I operated then.
At 30 feet, . . . both triggers pulled, . . . the "pattern" of 2 3/4 inch 00 buck was something in the neighborhood of 14 inches wide and about 9 inches tall.
I am very much thankful that I never had to uncork that thing, . . . but at the same time, . . . maybe the word got around not to mess with that long haired Vietnam vet that runs the sign shop, . . . however it worked out, . . . I was in a pretty seedy part of town but never had any trouble.
May God bless,
If you can breathe, . . . thank God!
If you can read, . . . thank a teacher!
If you are reading this in English, . . . thank a Veteran!