Sounds like a plan...hopefully you were just kidding about the salt loads. The sole disadvantage (if you want to call it that) for a smaller .38 Special compared to a beefier .357 Magnum is the size and portability. The .357 will be built heavier and stronger to handle the hotter loads. The flexibility it offers is more than worth the extra steel you'll have to carry around on your hip.
~ Blue Jays ~
No, I wasn't kidding. I'm curious as to why you think that way. My thinking is that I want a non-leathal shot at the ready. Since it's a semi, the serious loads are just a squeeze away. I'm not a reloader, but I sealed the top of the shell with a touch of parrafin aqnd then a spray paint sealer so the wax wouldn't gum things up. Also, that shell is only a target load. All my guns are inspected and oiled monthly.