Keep in mind that a three-inch barrel will give velocity about 75-80 FPS over that of a true snub. That Buffalo Bore non Plus P round must be pretty effective from a three-inch gun, and I agree with Brian that it should fare well, even from a snub.

I think I'd feel most comfortable shooting the Plus-P equivalent from a .357. That post about it giving sticky extraction from a Model 38 concerns me. Keep in mind that this refers only to Buffalo Bore Plus P, which is quite a bit hotter than for most brands.