JDW I suppose the Ithaca has short chambers, though I measured them at slightly longer than 2-5/8". In any event, I plan on loading light shot loads (3/4 and 7/8 ounce) in short shells. In fact I was going to buy Cheddites if that is the best way to go.
Based on your remarks, this looks like a good bet.

In another post earlier today I was hoping to learn of experience with old-time wads (nitro card and Alcan Feltan) in plastic hulls. I have a bundle of such wads on hand and might as well use them up. Have you ever used traditional wads in the Cheddite hulls? Will they work okay? I'm not into mass production, and therefore don't mind experimenting to get the correct wad column.