Slightly underspined arrows work well for target set ups sometimes, but not hunting. You would for sure be better off with a overly stiff arrow in a hunting set up with fixed blades. It would also up your weight some.

Having a stiffer arrow also helps with any inconsistancies from arrow to arrow in spine. If you have weak or border line arrows that have spine variances it will be much more promenent than it would be with a stiff arrow. At least that is what I have found.

Paul