I jumped on the Powerbelt bandwagon this year with the 348 gr. copper clad hollow point. After shooting the Knight 260 gr. lead bullet for many years with great results, I wanted an easier loading bullet. The bullet loaded great and I reduced my group size by over 50%. That's where the good news stops.
I shot a nice 10 pointer on Thursday last week and was highly disappointed in the expansion of this bullet. After shooting him more than once to keep him down, inspection found one bullet not quite through him, the others clean punches through. The one bullet recovered had fragmented around the hollow point, but had almost zero expansion. It was like you took a hack saw and cut the hollow point off! The 260 gr Knights always gave better than 50% expansion.
At any rate, this deer did bleed and I probably didn't have to pop him a couple more times (a wall hanger that WASN'T going to get away!), but the fact that he got up an kept walking after the first couple hits has me bugged.
I'm going to try the Hornady XTP's. They are designed to open up at lower velocities. My friend swears by Barnes MZ bullets. At ~$2 a round, he should!