I shot my Ithaca 10 NID Magnum twice last week in Quebec, I still have 1280 rounds of factory 3 1/2" non-tox left... I went on a reloading spree 2 years ago for the short 10s and I have about 225 rounds of Bismuth on the shelf. I don't think I am going to need the extra hulls for quite some time
Enjoy 'em!