I just bought a few boxes of Armscor 22lr and fired about 40 rounds through my old Ruger Standard Auto and got 8 duds. I tired twice to fire the duds and none fired. I then ran a few clips of Federal ammo through it with no problem. Perhaps the Federal is softer but I did not have my 17-1 with me to check this out thoroughly. Did anyone here have any issues with Armscor? I have used their 9mm and 38/357 with very good results.