Never having shot Powerbelts are living creatures yet, I can't rate their terminal performance other then some media testing I did long ago. But one this, like Super Hunt 54 said ... I always found them accurate. Funny that your .45 did not shoot them well.

As for Ed's bullets I shot a few of them out of my .45 GMB and my .451 White. Amazing accuracy. Just amazing. And boy do they thud when they hit my steel back stop.