I’ve felt there was something odd about that picture all along. It’s one redeeming detail is the weapon and the fingers of the forward hand seem to be blurred from horizontal movement at instant of exposure. That being said, the smoke just looks wrong. I’m not a shotgunner but I didn’t think a shotgun produced that much smoke.
Go poke around on the firearms message boards. There is a lot wrong with the picture and many/most of the gun guys think it is “shopped”; at a minimum, totally staged as in he was not shooting trap nor skeet.