OK so I used to pull military fmj projectiles from steel case and swap to soft point. Worked fine but the sporting projectiles were soft jacketed lead and the FMJs were steel jacket so hard. But you still need a bullet puller and reloading press so then you can almost reload. You just need a primer tool and scales.
Reloading subsonic loads will require removal of the original powder and using different powder like Tail Boss, shotgun powder or similar. ONLY DO THIS WITH PROPER DATA and get a reloading lesson.
Subsoinic projectiles are significantly less deadly than full power loads, you will have to get up close and go for head/neck ideally.
Bookmarks