There must be exceptions or oddities for Ithaca. I have a 20 Flues, grade 1, made 1919-1920 by serial number which was made with 30" barrels which was not in the catalog at that time. Short chambered at 2 1/2" and choked full and full I have used it to good effect on late season doves. It crushes Skeet targets. I think the previous owner used too many very heavy 2 3/4" filed loads because it has developed a crack behind the tang. He also trimmed the barrels back 1/4", to clean up some muzzle damage I suspect, because it now measures 29 3/4". Ithaca might have had a 30" barrel set on hand and just filled an order using up old stock. When I retire this gun will get a new stock and a good barrel refinish. The case color is still very strong so I will leave it alone. It handles like a dream.
