Caution: Avoid MFS .380 showing up for sale in many places
I just got a large supply of MFS .380 ammo from various suppliers. It a Hungarian brand and seems to be popping up everywhere and is about the only .380ACP FMJ offered by some suppiers. It WILL NOT fire in my Kahr P380. I don't know why. The primer dents but it will not fire reliably. My Kahr is over 300 rounds and handles quality brands FMJ and HP with no problems whatsoever but it will not fire this stuff. I can however get it off in a Sig P238, even the dented primer stuff the Kahr choked on. The inertia in the Kahr striker must be less than the Sig hammer strike.
Try it if you want but don't go overboard unless you have a lot of other .380s to play with it.