Bedbug I honestly don't know. I bought the gun new when I was 12 and didn't know diddley about them. My first loadings chained out of it. I bought a .451 mold with it and it shaved a thin ring so don't believe chambers are out of round. I use .454 balls now and it will still do it. As long as I lube the balls or use wads it's fine. I can leave all the caps off save one and it wont chain.
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