Out of a snubbie, it's my opinion, your not going to get high enough velocity to get full expansion of "fast and light" rounds. There just isn't enough barrel to get the projectile movin'.
That had some merit 20+ years ago, although even then the old-school 158gr lead hollowpoints usually do expand out of snubs, when the lead is soft enough.
Today, it's easy to get 125gr/135gr class JHPs that expand out of snubs...almost all +P Gold Dots from various ammo houses will do so, and the Winchester 130gr ain't half bad and a bunch of Cor-Bon 110/125gr loads works, although they stretch the term "+P" to the max (read: don't shoot 'em in weak guns).
Buffalo Bore changed the rules around by managing bullet energies similar to everybody else's +Ps, yet kept peak chamber pressure down below +P. So those are now the absolute kings in terms of standard pressure.
The neat thing about 158gr lead hollowpoints is, if they don't expand at all, you still get a bullet shape identical to the Keith-profile Semi-WadCutters (SWC) that JaxJim advocates. So there's NO reason to go his route, period.
If you really don't believe expansion will happen, go with the Buffalo Bore 148gr full wadcutter. That load will tear a maximum-size hole with no expansion, and being harder lead it will hold it's "sharp edge" longer in tissue.
JaxJim: check out Brassfetcher's site:
http://www.brassfetcher.com/
Almost all of the 38Spl data is from snubbies. LOTS of expansion going on.