The issue is not brass strength, but case length which if shortened reduces powder capacity and thus raises pressures.
Lyman's cast bullet 358156 is a gas check SWC with two crimp grooves. The forward groove is intended for loading in 357 cases, while the rear groove is used when loaded in 38 special cases. In either situation, the result is basically the same overall loaded cartridge length with the very comparable powder capacity.
You can confirm this info in many other sources.
Just do a search for "lyman 358156 38 cases". You'll see references to the Skeeter (as in Skeeter Skelton") load. This post touches on the pertinent issues:
Alliant 2400 and the Lyman 358156 Skeeter Load? | Single-Actions

Start with reduced charges and work up slowly looking for pressure signs. Avoid maximum charges.
Here's a chart of Lyman cast bullets:
Ol' Buffalo Bullet Mold Tables