I’m getting into reloading all-brass .410 and I'm still learning about the process. I’ve noticed some references to forming cases from other calibers and using non-standard sizing and decapping methods rather than sticking to dedicated .410 dies. For the pros, which parent cases have you successfully formed, and what combos of sizing and decap dies are you using? Any insights on case prep, wall thickness challenges, or die modifications would be really helpful!
