I like 416SS. It is fairly easy to work, not difficult to solder, in the case of guards.
I find that it works about as easy as nickel silver, maybe easier.
303 on the other hand, is nasty to machine, and almost impossible(for most makers)to solder, and will gum up your tools.
Some people say you have to heat treat 416 for better corrosion resistance, but I have never done this, and have had no problems, either here in Arizona, or the more humid climate of the Southern California coast.