A regular (proper) round of .380 in a 9mm is never a good idea but likely no safety concern.
However the offending round of Freedom Munitions likely was not that, but rather a 9mm bullet and a powder charge appropriate for a 9mm round stuffed in to a much smaller and non-tapered piece of .380 Auto cartridge brass.
Net result, if the extractor kept the round against the breech face and it was discharged would be increased pressure due to smaller combustion space and a seriously warped or blown piece of .380 brass.
If you are a hobbyist handloader and you build that round, YOU NEED SERIOUS WORK on your process and you are putting yourself and others near you at risk. However, if you are a commercial re-man outfit and you do that and you SELL that and profit from it...
Well, that's my position. While I understand it is far more than just taking on a huge new hobby (it's a lifestyle, honestly...) my answer for needing or wanting factory re-man is simply "learn to make your own and you'll get better and more ammo for less money and you'll love doing it, you'll learn a ton and your pride will swell."
However the offending round of Freedom Munitions likely was not that, but rather a 9mm bullet and a powder charge appropriate for a 9mm round stuffed in to a much smaller and non-tapered piece of .380 Auto cartridge brass.
Net result, if the extractor kept the round against the breech face and it was discharged would be increased pressure due to smaller combustion space and a seriously warped or blown piece of .380 brass.
If you are a hobbyist handloader and you build that round, YOU NEED SERIOUS WORK on your process and you are putting yourself and others near you at risk. However, if you are a commercial re-man outfit and you do that and you SELL that and profit from it...
Well, that's my position. While I understand it is far more than just taking on a huge new hobby (it's a lifestyle, honestly...) my answer for needing or wanting factory re-man is simply "learn to make your own and you'll get better and more ammo for less money and you'll love doing it, you'll learn a ton and your pride will swell."