I am speculating that it is a Kassner import. If so, it might be doing the same thing as a low priced Spanish gun I have was doing that I bought new waaaaay back when. Once I fired it, I had to break the gun open over my knee and at times that was even difficult. The firing pins were going to far into the primer and you could see the drag marks on the casing. Out with a fie and I fixed the problem.