Cajun,
The main problem with most lightweight snubbies is recoil. If you're not recoil shy and you don't have overly large hands, then a lightweight snub might work wonders for your every day carry (EDC) gun.
I'm figuring a loaded Glock 19 weighs in about 28-30 oz.
S&W's lightweight revolvers fall into two categories. The aluminum alloy framed guns and Scandium framed guns.[¹] The
Airweight guns use the aluminum alloy, typically weigh in between 16-18 oz. and are limited to the .38 Special +P cartridge. Scandium framed guns weigh about 13-16 oz and can chamber the .357 cartridge. The down side is that a lightweight .357 can induce more recoil than the .44 Magnum. In turn, this can slow down your follow-up shots by 2 seconds or more.
I have an older Airweight Model 42 Centennial (hammerless) that I found only marginally comfortable to fire at the range. It weighs in at 15.8oz empty. It can be carried comfortably all day and/or in a front pocket. But that recoil was enough to retire it for occasional back-up gun duty. When I carry a lightweight snub it's the 432PD in .32 H&R Magnum with six shots instead of five.
S&W Model 42, .38 Special (top), S&W Model 432PD, .32 H&R Mag (bot)
Much more likely to be with me is a 23oz S&W Model 649
Bodyguard with the shrouded hammer. This .357 is normally carried with .38 Special +P in the form of Speer Gold Dots or the 158gr LSWC-HP "FBI" load. I can carry this all day in a IWB/OWB holster, but it's too heavy, IMHO, for pocket carry.
S&W Model 42, .38 Special (top), S&W Model 649 .357 Bodyguard (bottom)
Also shows the Centennial (hammerless) vs. Bodyguard (shrouded) styles
A "best buy" at the moment seems to the
Airweight Model 438, .38 Special +P. This has the profile similar to the 649 (Shrouded hammer) with a blue/black finish.
For a 5-shot revolver, moon clips are unnecessary. Moon clips are prone to getting bent even with short 9mm/.45ACP ammo. Longer .38/.357 ammo is likely to tweak the clips when carried daily. Speed loaders or speed strips are viable reload mechanisms that can be nearly as fast. With practice, a J-frame can be reloaded from loose rounds in your back pocket in about 4 seconds.
Someone mentioned the Taurus 617TBC Titanium snubby. A friend has one and it is very lightweight, plus it's a 7-shooter. The down side is that this means it's about the size of a S&W K-frame. It also recoils like that proverbial Missouri Mule with .357 ammo.
If light weight is driving you, I suggest that you test-fire one or two range rental guns before you decide. Then stick with the 438, 442, 642 or 638 models in .38 +P. The 438 & 638 are shrouded "Bodyguard" styles while the x42 models are hammerless "Centennial" models.
¹
S&W discontinued their titanium line of snubs and they fetch collector's prices now.