RE: Ithaca Mag 10
There is a replacement recoil system (or used to, not sure is still made) that solved a lot of the jamming problems.
I don't see many in the marsh any more .
With the new nontoxic shots the need for the 10 is waining.
Have you priced shells ? The loads are not realy any better than the 3 1/2" 12, but cost more $$
IMO buy a 3 1/2 12 ,pump or auto and you will have a more versital gun