I have been recommending Critical Defense in my classes for the past several years. It seems to function well in the micro pistols we have tried it in, like the SIG 938, P290, and P365. I was just reading about SIG 365 V Crown ammo. I don't know all the particulars, but SIG developed the round specifically for micro pistols like their P365. I have not yet been able to get my hands on any of it to try.
An Official Journal Of The NRA | Range Test: SIG Sauer 365 Elite Performance Ammunition
Designed for use in short-barreled concealed-carry guns, the SIG Sauer 365 Elite Performance ammunition ensures expansion and penetration.