bowhunterjohn.. welcome to the forum. Nice to have you here. I have heard this same story so many times with Powerbelts. Some people swear by them some swear at them. I have yet to have the opportunity to shoot a deer with a powerbelt. I have tried now for two years but the deer will not cooperate.

Perhaps you might want to see how your rifle will shoot a 300 grain XTP. While this is a different design, if you place it in the rifle place, very few people have complaints with them. Also they are said to produce massive blood trails.

There are a lot of different projectiles out there you could try. All of them will still boil down to shot placement.