The circle for all firearms except for shotguns is properly sized. With all shotguns, the spread is far too large for both the width and especially height of the spread. The image linked is only of the Benelli M4 (Auto Shotgun) but the issue also applies to the SPAS, wooden, and chrome shotguns.

Linked is the spread of 10 shots the auto shotgun, fired at that distance on the Tumtara map, compared to the circle. The circle was allowed to recover to the starting position after each shot. No mods which alter the accuracy of any in-game weapon was present.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3387145734