You could Loctite it, cold peen it, or put a bow the pin. I've done all three methods on different firearms with success.
If you cold peen it or put a bow in it then it should be a small amount. When I was a full time gunsmith I often had to deal with virgin parts. Meaning, I had to drill my own holes and friction fit the pins. The pins needed to be just a few ten thousands larger than the pin hole. If it were me I would try blue Loctite first then move on, if it didn't work, to peening or bowing the pin. Sometimes getting a new pin from the manufacturer doesn't work.
Or you could ship the pistol back to the manufacturer.
Thanks, Paul
