A guy I used to work with wanted to cheat a "little" at the shooting match. He knew they were using Federal paper 1 1/8 ounce 9s so he brought me some hulls and asked could I help him out. So I loaded 1 1/2 ounce of 9s into the hull, and one could not tell the difference between a new shell and his secret shell.
So when they handed him the shell, which they do one at a time so the playing field is fair, he would pocket the factory shell and slip in the "magnum." He said it sounded like a cannon going off and would almost knock him to the ground in the light gun. I doubt it took the shooting match people long to figure it out. I guess I should have cut back on the powder.
https://www.turkeyshoot.net/rules.htm
In the link above you will find the 2-2-10 shells mentioned.