Richard, the only bullets you have to worry about are bi-metal labeled bullets which are rounds like the example Tula here (It tells you right in the description) : budsgunshop.com/catalog/product_info.php/products_id/98496/tulammo+ta223552+centerfire+rifle+223+remington%2f556+nato+55+gr+hollow+point+20 ------------ This applies to 9mm, .45 ACP, .380, .223/5,56 or any other rounds you intend to shoot. And yes, this is taking into consideration the bullet only.

Richard - if it isn't designated as 'steel core' on the package, pretty much any domestic commercial ammo is 'non-magnetic'. I am not aware of any bullet that is 'magnetic' other than some of the .223/556 "green tip" ammo. Like Michael, though, I have not found any indoor ranges that allow steel cased ammo.

Richard, Most bullets in ammunition are not steel. They are almost all lead or copper clad lead. Very seldom see steel bullets in ammunition. Not arguing, but I don't know one indoor range that allows steel casing. They recycle casings and can not have aluminum or steel contaminate recycled brass. You can buy 99% of ammunition and not have magnetic (steel) bullet in a casing to make up the round.