i was shooting federal .22 #12birdshot shells today out of my 10/22. first they didnt have enough recoil to cycle the action but that didnt really bother me. i shot about 20 of these rounds with no problem then shot about 50 rounds of federal stinger. when i started shooting the birdshot again the casing was getting stuck in the bore after i shot it. i had to pry it out iwth a knife. i happened to look down the barrel and notice that these birshots were making my barrel filthy. anyone know that the problem could be? im gonna clean it tonight and try again tommorow.