IMO a hunting bow should have at least a 7" brace height. If you can have a bow with more then all the better. The only down side is that the power stoke is shorter and some speed is sacraficed for shootability.

All other things being equal..... as the brace height gets longer or shorter the bows power stroke gets longer or shorter in exact proportion to the brace height. Example...Bow "A" with a30" draw lengthand a 7" brace height will have a power stroke of 21.25 inches.Bow "B" with a 30" draw lengthbut with an 8" brace height will have a power stroke of 20.25 inches. Bow "B" will also be about 10 fps slower but more shootable.