yes that charge is more then enough to take a whitetail out to 150 yards based on some of the different balistic tests I have seen, and from some of the hunting experiences I have read. I have never personally had to use a muzzleloader over 90 yards hunting. If you place the shot in the right place, the projectile will do the rest on the thin skinned deer.

For long range shooting you might want to look into some Shockwaves, Barnes Expanders, or some Buffalo Bullet SSB's. Those are my favorite anyway. I use the Barnes Expanders in my Knight rifle, and the other two in my Black Diamond XR. I shoot powerbelts in the CVA Staghorn Magnum but because of the no scopes allowed in muzzleloading season around here, would not shoot over 100 yards personally unless all was perfect, and I mean perfect.