If your hawken has a slow twist 1 in 60 or more the chance are that it will shoot a round ball best,for deer hunting under 100yds it will do quite well; Black powder or pyrodex are the stand by but I hear that Black Mag and APP are being used by some and there are a few experimenting with others.I would say that if you are using #11 caps Black would be the most dependable since the others are prone to hangfire or misfire with #11 caps. Lee