2.5 inch vanes might be fine for target points but I doubt they would be enough to stabilize any broadhead. Even if you were shooting mechanicals I think I would go with a larger vane. I consider myself to be a good shot but I would not consider hunting with such a small vane. Have you shot your A/C/C' s with a 2.5 inch vane and a decent broadhead in a strong breeze outside to see how they group?