Will you be able to carry a 4” barrel full sized revolver concealed? I love revolvers and .357 mag but not lightweight or snub barrel carry ones. You lose a lot of performance going shorter then 4” w/ the mag and the snub .357 mag carry revolvers generally suck to shoot which means less practice - that doesn’t make for better able to protect yourself. Also, are you accounting for accuracy & capacity in your “better able to protect yourself” scenario? I’ll take 21 rounds of 9mm in my Sig 365 (10 + 1 & a spare mag) all day every day over 5 or 6 x .357 mag revolver if I’m concerned about protecting myself. It’s cheaper/easier to train with and far more available too.
Not familiar enough w the carry gun options in .357 Sig nor the caliber itself to comment on that although if I were looking to upgrade from 9mm to a more powerful semi round I probably wouldn’t limit myself to Sig .357. What about 10mm? .45ACP? Fotay?