Ran the numbers on Ontarget and another program. You are slightly weak. But nothing that you shouldn't be tuning out.
have you tried different arrows with your BH's? Nothing out of the ordinary to get bad spined arrow out of a dozen. Also are you spin testing the arrow? Does the BH wobble any?
You honestly sound like you might have slight fletch contact. Blazers are taller than most. Try rotating them. I suppose your shooting c-ock down.
Do not by 400 or 500 arrows. That bow has a lot of energy.