As for the Powerbelts, I shot the 295 grain Hollow Points in the Remington Genesis I had for a while. I shot them over 100 grains of Pyrodex pellets. They actually shot pretty well. I never had an issue with the accuracy of them. I can't remember for 100% certain what size the groups were, but if I remember correctly most were well under 2" at 100 yards. They were pretty accurate. Sometimes I'd shoot a few and they would all be touching where other times, I'd get a 1.5-2" group. I was really happy with how they shot until I took the gun hunting. They perform horrible on deer, but I hated to give them up because of how well they shot.
I switched to the Federal Fusions, and then the Speer Gold dots, both in 300 grain, and luckily, they shoot just as well, and do 100x better on Deer, or the Fusions seem to, I've yet to see a deer hit with a Gold Dot, but it appears similar in design. I'm really not sure why anyone would use Powerbelts unless they were getting them for free like a certain member is here. Not that there is anything wrong with that, as it's not, I just don't see another reason to use them.