Does anyone know what the best slug to use for the Rossi 12 gauge single shot? I have attempted firing Federal bird shots and it misfired 8 of 50. I used a remington slug and would not fire at all. Fire 3 of 5 federal 3 in slugs, and fired 25 winchester birdshots without a single misfire. The birdshots and remington slugs were the 2.75 rounds. I am totally confused. I am going deer hunting. I want to get a slug that won't misfire from this gun. It is only 2 weeks old. When it doesn't misfire it shoots great.