Hardyhunter,
Just my 2 cents worth but I would not reccommend light fast bullets for a muzzleloader. It seems as though companies are trying to convince us that 150 grains of powder with 150 or 180 gr bullets is better when I do not think it is. I have found that 300 gr Barnes Expanders with 100 gr powder are awesome on deer and I can aim right on out to 125 yards. The guys who use heavier bullets than 300 gr have to be more careful about trajectory but they have even more power.