Blazer aluminum case out of a Rossi 38 sp
I picked up an old rossi interarms 38 special (not +P rated) from a cop for $100 including 45 rounds of ammo. It was his backup and only ever shot 5 rounds out of it. I've put a few hundred thru it and its a good little snubby. I just bought a box of blazer ammo for $12. Turns out it has aluminum casing (I know, I know, I should have read the box first). I don't reload so don't really care about that part. I know steel casing can screw up a good weapon and wanted to see if aluminum casing would be an issue out of my Rossi.
Secondly, since I can't use +P what would be the best self defense ammo to use in it?