But what's most important, is that S&W didn't say I wasn't allowed to shoot steel case; or even that they frowned upon it. Simply that if the ammo meets SAAMI specs, they are happy with it.
That's a good response from S&W, which increases respect for them as a company. Too many manufacturers use the whole steel-case-voids-any-warranty thing purely because it gives them an "accepted" liability loophole, IMO. In other words....they say that because they can get away with it.