When shooting a gun with the Knoxx stock and turkey loads, do not shoot off sand bags like you would with a rifle. My lip is twice as big as normal on one side. I did shoot a few more shots standing up and also keeping my head up and that went a lot better. I figured it out, you put your chin on the stock and that is all. The 3" Federal rounds kick but not as bad as when shooting off the bench.
Where I see the difference with the stock is on my shoulder. After shooting 12 trap rounds and 6 3" rounds, my shoulder does not feel as bad as when shooting without the Knoxx. I have a bad shoulder and it was not bad shooting other than my lip. I am a little worried about the 3.5" coming down the road.