Being the question has been answered this should have been the first clue.
I see at the local Walmart has 357 Sig target bullets
Question- Did the Ruger come with a owners manual? If it did shame on you for NOT reading it. Did you bother to ask the ammo question where you purchased the gun?
NRA Life Member, NRA Range Safety Officer, IDPA Safety Officer, USPSA NROI Range Officer
As you are, I once was, As I am, You will be.