I picked up a box each of GECO .38SPL and .357M.
The case mouths do not appear to have any crimp at all. They are not flared out, like the FM junk I've commented on elsewhere, but just completely straight.
I'll shoot them carefully and see how it goes, but do not think I'll reorder .357s. Might be OK for practice .38s if they happen to be priced better than anything else when I need to buy.