what are those shotguns with the pistol grips used for?
Armored Cars.
I used to assist with teaching stuff. I hated having to teach PGO shotguns to the Armored Car Guards. Qualifications took care of any interest of Guards having one for HD .
Breeching and a few "special" needed applications.
I still prefer and use a full stocked shotgun. I even demonstrated and let a few of the better / more receptive students shoot from a Armored car to see the "tools for the task" differenced.
You stick me in the back of Car...gimme a full stocked SG with 12.5 LOP - please.
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Gun fit to shooter-
Mounting Gun to face-
Hearing protection -
Make HUGE differences in percieved recoil.
2 3/4" shells are all one needs. Learn the correct basics with Target loads.
Wood is denser than syn , and allows a stock to be fitted in LOP, drop, heel , toe, cant....to fit shooter.
I finally own a Shotgun that will take 3" shells (other than .410) . I have not fired a 3" shell in it yet - nor do plan on it. All these years, all the hundreds of thousands of rds I've fired, all the deer, ducks, geese, rabid dogs...you name it. The 2 3/4" shells worked for me.
Exception - the .410.