As far as what I’d do different, obviously my confidence is shaken. I did work up this load and I did use a chrono that averaged a little over 1250 FPS and inspected the cases along the way which did suggest any issues as you can see from that pic I posted of those cases. I will definitely go back and start with a much reduced charge looking more at Hodgdon’s site as the powder OEM versus other sources. As far as the Lee Bulge buster, I’m not sure. Some mixed opinions here, and mine is as well. As well, I also question if it my error at all, although I’ll still proceed with caution. in searching, I found this on YouTube which looks similar to my failure. Skip to 2:30, and an interesting comment he makes at the end.