Years ago I had a 16 gauge Stevens 5100. On opening day I went duck hunting for the first time in my life. I had no experience shooting crossing shots and missed one duck after another after another. In frustration I began shooting both barrels a once, I don't know how many 1-1/8 ounce doubles I put through that old beat up Stevens but needless to say it took a licking and kept going, as for me, after 2-1/2 boxes of shells I finally managed to hit one accident-prone duck. I would suspect that you had bad shells in your gun that caused the failure.
Steve

Approach life like you do a yellow light - RUN IT! (Gail T.)