Special low power .38/.357 load

Yes. I do this all of the time. You want to use a soft lead, 148-grain hollow-based wadcutter, seated FLUSH with the case mouth, so as to use the bullet to take up most of the excess free airspace in the case.

From a 2-inch gun one grain of Bullseye or TiteGroup will expell the bullet from the barrel, but better accuracy and greater assurance that you will not "stick" a bullet in the barrel is provided by using a heavier charge of about 1.5-1.7 grains of the above powders.

I use the RCBS Little Dandy powder measure with the smallest volume powder rotor they make, #00, which according to their charge table meters 1.7 grains of Bullseye. This is enough to expel the bullet reliably from a longer barreled revolver or to use the light wadcutter single-loaded in a .357 rifle. If fired from a barrel longer than 20 inches it is very quiet. Not like an air rifle, but like standard velocity .22 LR. It will be louder in a revolver due to the cylinder gap.

If you want to experiment with a lighter charge, the attached graph shows lengths to trim .22 LR cases to make a dip measure. A .22 LR fired case measures 2.8 grains, shortened to 0.4" gives 2 grains, 0.33" gives 1.5 grains, 0.25" gives 1.2 grains, 0.20" gives 1 grain.

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Special low power .38/.357 load