I spent my first year of shotgun shooting with only the very tip of the bottom of the pad on my collar bone. That used to make other people cringe when I pulled the trigger, but it didn't bother me one bit.
I then started to put the gun down where it belongs and learned to shoot it from my shoulder. Took a few sessions to get used to it, but it works for me now. Just have to bend my neck more than I used to.
That is just where I am at, Gringo; learning to shoot with the pad in the pocket and leaning into the gun. The problem I have with that is then I am looking over my glasses. A solution is to get dedicated shooting glasses.