Have you tried changing the tip wieght?
And most importantly is your draw length actually what you think it is?
I find guys when being measured for arrows always pull further then when actually shooting. many seem to short draw.
Happened last to me at the range. This guy had just purchased a new 40# recuvre, up from a 35#.
His arrows flew light crap. He started with only a 6" brace height. So we raised that to 7 1/4",
I found that even raising nock point and or brace height made no difference. He was shooting 400's. I shot one from my 65# and was told to make sure I did not pull to much as his arrow was short. Short? I said, I draw 271/2" you said you drew 28". Well his arrow were about 26" and he had room left over. He was probably only getting 30# max.
Just a thought.