i also have a vz58L and it mangles soft point ammo pretty good.
Both the brass casing gets mangled by the receiver, and the cartrige sometimes jams when the soft point gets snubbed against the feeding ramp.
I polished the feeding ramp on mine which partially fixed the jamming but the brass was still mangled (if you're interested in reloading).
IMO these rifles were designed to shoot FMJ steel cased cartriges and that's what we should feed them.
I also don't think it's relevant that a cz858 has no problems digesting the soft stuff since the vz58L isn't a cz858 with a chrome bore, it is actually a long barreled vz58 (hence the L designation) both made by cz hermex...