That looks like pretty good performance..... It would be interesting to see a picture of the mangled one next to an unfired one. I'll give em a try. My 270 gr platinum powerbelts on top of 125grs 777 travelled through almost the entire length of an elk and didn't expand. I really didn't expect any muzzleloader setup to be able to even do that (the bullet did exit), but to be fair, it didn't hit a single bone. Not sure why people rave about these things.

Just for fun, I shot a heavy guage steel culvert with one. Same results..... entry hole same size as the exit hole out the back of the second side of the culvert. These are supposed to HUNTING bullets..... I'd call them very expensive practice rounds.

BTW, how does that heavy bullet with all that powder behind it treat your shoulder?