I'm assuming that brass is flexible, expands and then bounces back to it's original shape. But if aluminum and steel expand and don't contract wouldn't they cause guns to jam more often for example?
Steel is magnetic, and can spark...Sparks are not good things around gun powder....CCI loads some pistol rounds with aluminum cases, but they are not re loadable, as the aluminum is so soft the primer pockets will wear out quickly..Aluminum, metallurgical, has a valence of +3, which means that moisture would cause electrolysis to set up between the steel primer cup and the aluminum case, which would pit the primer pocket...Steel is harder than brass, and would not uniformly expand on the firing sequence, and would be likely to rupture instead of expanding and sealing...Also, the hardness of steel would make resizing cases difficult, as steel needs to be heated before reshaping.......Hope this helps....
This Site Might Help You. RE: Why can aluminum and steel casings not be used for reloading? I'm assuming that brass is flexible, expands and then bounces back to it's original shape. But if aluminum and steel expand and don't contract wouldn't they cause guns to jam more often for example?
Some Blazer/CCI loaded ammo comes with aluminum casings, it is easy to tell because they have a very dull finish compared to the nickel. These cases are not safe to reload. There is also Wolf brand from Russia that has a steel casing, it looks laqured and it may or may not be able to be reloaded.
