I have 2 MAXs with about 900 rounds each. One hates Fiocchi FMJ, but has been otherwise completely reliable. In fairness, I've had other small .380s that don't like the Fiocchi either. The second MAX has had 5 failures to lock back on the last round with multiple mags, but has been 100% otherwise. I like 'em, but because of physical limitations, I prefer my P365-380s. I wish S&W would do a Shield Plus in .380, but I don't think that will happen.
I have 2 of them, each with about 1250 rounds. The first one, which was very early production had a handful of feed failures with XTP ammo when it was new. Once the feed ramp smoothed out, that issue went away. It hasn't had any other problems.Has your 365/380 been reliable?