NEWLY made steel case ammo that is generally branded for sale in the USA is non-corrosive.
Much of the SURPLUS MILITARY steel case ammo is corrosive.
Are there any other disadvantages like reloading issues or shelf life?
what is the big disadvantage to steal cased ammo ive heard that it can be corrosive?
No. Steel used for ammunition is softer and more malleable than brass. It is easier on the chamber and the reloading dies. Its is hard to reload from what I understand because it is so soft. Most people I have talked too think it's more trouble than it's worth, when you can find boxer primed steel cases.