I did not clean it after the first 20 rounds.
I do not do my own loading.
The first box of ammo was different than the last 20. This past time we shot 100 grain still but used Winchester.
I have cleaned the best i know how and also put grease in that area. Won't know if that helped untill next time we go out.

We'll see what happens but I do appreciate everyones questions or comments. Thanks