Here's a video from a couple weeks ago. It's good to get video of yourself from time to time. You get to see all of your little ticks, habits, and weaknesses. Here is one of mine. It's getting better for sure, but still needs refining.
It's been a bad habit of mine to place the shotgun in my shoulder and not to my face. Been fighting it for a while now. But, I can tell you that when I get it right my hits are harder and much more consistent. So, mount your gun to your face not your shoulder.
You may not realize the little things that make a difference until you see it, or get told about it. I'm not a perfect shooter, but i'm working to get better every day.