My new SW22 Victory has been to the range once, and has perhaps 150 rounds through it. Nice shooter. Tried to take it apart today and the screw won't move at all. Build date is 04-07-16. I have now sheared two hex bits. Screw won't move, then the bit snaps. One was an impact bit, and the other was a hex mounted on a 3/8" drive socket. I can certainly clean the bore without taking it apart,
but I'm going to have to try heat or something else. I haven't tried the hex that came with it because I didn't want to break it too.