When the stainless steel barrels came out, it was for the purpose of adding extra barrel life to magnums with a reputation for rapid wear on the barrels.
The undisputed talk from the gun writers was that hunters would never buy a rifle with a stainless barrel! Standard bluing wouldn't work, so they had to improvise a type of bluing.
In the meantime, the combined PR departments of the gun manufacturers, along with the gun writers, set out to sell the public on stainless steel and just how cool the stainless rifles really looked.
Anyone think propoganda (Oops, I mean advertisng) doesn't work?