Suggestion…if the new gun is going to be mainly used on clays, try a 32 inch example before you buy a 30 inch.
I’ve never handled a 32” gun. Do you find they swing more smoothly?
They should balance similar with the 30's may being a little quicker. Not sure what clay game you will be shooting, however in Sporting Clays 30 inch barrels are a hard sell.
