RE: is whisker biscuit a good choice
The biscuit is supposed to be loose not tight. The aluminium biscuit is sized for up to a 22XX size arrow without being tight. You can pull the ring of the biscuit apart some to make it a bit bigger. I actually prefer using the aluminium biscuit with ICS carbons, I think it shoots better than the " correct" ICS sized biscuit. Good luck hunting!