Anything I wouldn't fire in a alloy frame snubbie is built on .357 brass.
That said, the Lee reloading book has a fair selection of +p loads worth looking into.
My general purpose load is 6.6 gr of AA#5 with a 158 gr cast (or plated). It's above +p .38 but falls short of true .357 pressure. It's quite accurate in all my .357s with plenty of power for day to day range use.
Caution: Sanity check all load data from the internet against reputable published sources.
“At the core of liberalism is the spoiled child – miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats.” — P.J. O’Rourke