I put on a new sight a while ago on the front, it's one of those Hi-Viz types I got from Mossberg. Anyhow, I screwed it down and thought nothing of it. Get back from the range and notice the end of it sticks through into the inside of the barrel and it seems to be causing an issue (pic) when fired. Mostly it looks as if the bird shot is hitting the bottom of the threads.
Any thoughts or did I do something wrong on installation?
Any thoughts or did I do something wrong on installation?

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