First let me say that I doubt that one shotgun in a hundred actually gets patterned.

I' m going to do a little guessing here so we may have to look up some of these percentages.
A full choke delivers 70% of the pattern in a 30" circle at 40 yards.
Modified is for 60%, and Improved cylinder is for 50%

Go to a meat store and get paper that is very wide, at least 40" wide and get a dozen pieces 40 X 40 or larger. Draw a 30" circle on them and fire once only at 40 Yards. Do this with lead and repeat with steel

You will learn two things...1 does the gun shoot to the point of aim. 2. what shot size patterns best.

I doubt that you' ll have any disappointments with the Beretta.

Now can someone confirm the 70, 60, and 50 % data?