There's a whole lot of arguing and some posts are in the gray area. You're all welcome to continue the discussion but remember the rules.
After reading all 13 pages of this topic, a few things seem obvious.
1. Members in this topic use different hunting methods and styles and would have different requirements for bullet performance, i.e. shoulder shots vs lung shots and short range vs long range.
2. Members in this topic also seem to have different self-imposed hunting/shooting limitations which could also lead to differing bullet requirements.
3. Some bullets may have more failures if used in a manner they weren't designed for, i.e. lung shots versus shoulder shots, etc.
4. To say that any bullet that has killed lots of animals is not a good hunting bullet is not as accurate or correct as stating that same bullet has limitations and there are better (more all-around type) bullets.
I don't hunt with a muzzle loader (yet) but this discussion reminds me somewhat of people discussing specialty (more expensive) ammo versus regular ammo (Remington Core-Lokt versus Nosler Partition comes to mind). There's a time and application for just about any ammo. If you don't exceed the bullet's performance parameters, then you should do just fine provided you do your part as a hunter. This is JMHO and YMMV as always.