Sounds like a venting problem maybe. Or perhaps a too tight sprue plate. Just guessing here though. I use to pressure fill when using my Saeco Pot. The bottom spout was shaped perfectly for that.Can’t get a decent fill out without doing it that way. Never have that problem with any other mold.
Hmmmn, Xtreme sells plated 100gr HP bullets, and there are published recipes for that weight.The 380 can be a challenge to handload, just keep it’s limitations in mind. The case has a internal taper, so bullets weights and length are limited to 95 grains max. Small internal powder capacity, which will limit the types of powders that take up a lot of space in the case. Testing with my S&W Walther PPK/S has sown Power Pistol to be a great Performer.