Hi Jay!
Actually - if they are the same rods I have, they will fit through a 28 GA BBL. I'm just wondering out loud here - BUT - I wonder if the 20/28 rods are a slightly smaller diameter to protect the bore a bit from the brass fittings?? Just a guess - and not really sure?? You might want to call Tony and ask directly.. He's "good people"...
John
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