I shot carbon express hertitage 250 arrows for 4 seasons. I used a 150 grain broadhead and the arrows flew well.
This year I decided to give the extreme FOC setup a try. So I worked up to 300 grains and a 50 grain insert. The arrows didn’t seem to fly perfectly every time. If I had a bad release they would take a long time to recover. So I went to 350’s to see if that would help. It didn’t.
So then I tried some gold tips. They are much lighter than the carbon express for the same spine range. So my gold tip arrows with 350 grains up front weight the same as my carbon express with 150 grains up front, about 620 grains total. And I have yet to see an arrow fly poorly.
I don’t have an explanation for what I saw other than that the carbon express arrows with an extra 150 grains was maybe flying too slowly for the feathers to be able to stabilize the arrow quickly. I don’t know. My bow pulls a little less than 60 lbs at my draw length.