For this exact reason here just like any business, if they can't make any money from it they want to have nothing to do with it.
I have shot many of rds of steel & alluminum cased ammo through everything i have ever owned at 1 time or another zero issues along the way.
Not saying i have shot thousands of rds through each but i have used steel cased ammo.
Have used more alluminum than steel over the yrs when the price is right you take full advantage of that.
When i do go to a range i pre load all my mags at home so when i get in my lane its go time & if there is steel, alluminum or brass they get it all.