DeDeerHunter

One thought, although I am not a PowerBelt shooter. I have shot a few but far from being an expert. I have read several times that before you shoot a PB remove the plastic base and reinstall it. Several posters have even said to add a bit of bore butter to the spike and then replace the plastic.

One of the things that effects bullet impact is when, where and how the plastic leaves the bullet.

Another thing might be, how hard you are driving the projectile out the barrel. I am sure Cayugad will see this post and give you some excellent advice about the powder charge. I am just not qualified to speak to that.