Not a bad thought Don. Personally I'll go with a mid-weight set-up, which is around 415gr for me. Granted, a light arrow will be enough to do the trick. But where I get slightly concerned is on say... a large pig at 45-50 yards. The heavier arrow will carry much moe of it's KE at that distance. Also my bow was shootingthe arrow at 290fps whic is plenty fast for me. Also, the heavier arrow may be slightly quieter than an arrow that is 5gr/lb. I feel that I will benefit morefrom the heavier arrow than a few extra fps. But then again... it all comes down to shot placement, regardless of what you are shooting.