I haven't noticed any difference in my practice blades on the Muzzys. I believe your bow needs more tuning. I almost never find paper tuning to be adequate to get the best broadhead flight. I'd recommend bare shaft tuning out to 20-25 yards. Then see how they fly. I also recommend experimenting with arrow spine, by changing your draw weight a few pounds at a time. There will be an optimum draw weight for your particular arrow broadhead combination and you should experiment to find it.