I don’t understand why powerbelts haven’t updated their bullets. Actually, I guess they did somewhat, with the ELR, which is a tougher lead alloy. As far as I know, all the other PBS are still just soft lead, with some having a copper or platinum outside that does nothing to make the bullet tougher.
It has to be money: that the original is still selling well so why change a good thing? Eventually their lack of innovation will catch up with them. The bullets are virtually unchanged since they came out 30 years ago as “black belt bullets”
Powerbelt has stopped producing the standard .45 PBs. Only the ELR version is now available in .45.