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.
It’s POSSIBLE he’s “patterning” the different choke tubes and not actually shooting clays. My grandfather and uncles on my mother’s side would do this with a new shotgun or different loads every bird season. Dad’s side of the family leaned more toward concealable sidearms. I’m not saying POTUS had a clue about what he was doing and the timing of the gun and camera was amazing. I just find it too coincidental. I looked at some older Hickock45 videos and didn’t ever see that much smoke.