I had a retail store years ago in a "less desireable" end of town. My front door was 25 feet from my cash register, . . . only way in during regular hours.
I bought a double barreled 12, with 21 inch barrels, . . . pattern tested it out in the boonies, . . .
If I pulled both triggers at the same time, . . . I got a pattern that was almost 18 inches wide, . . . and about 6 inches tall. That was at that same 25 feet distance.
I used Remington high brass 9 pellet 00 buck for my test.
Thankfully, I never had to use it, . . .
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!