I had the same trouble with a box of Federal bulk .22s. Noticed one with a soft report but it did clear barrel in my 22/45. About three rounds later had a second one that made less noise than a toy cap. I stopped and the bullet was about an inch and a half down the barrel from the muzzle end. Tapped it out, luckily no damage. Contacted Federal and they sent a pickup tag and replaced the ammo.