When I first started shooting a muzzleloader in 2000 I used the Barnes Expander in 250 or 300 gr with Pyrodex pellets. They are very accurate and hold together well. Over the years since I've progressed to using 110 Gr. by volume of BH209 and either Hornady's SST 300gr or Harvester's 300gr PT Gold.. Hunting in S. Texas that load gives me the ability to take the rather ommon longer shot and they have performed well for me. The Barnes Expander or Lehign's new bloodline should provide the better wound channels you are looking for at shorter ranges or when using reduced powder loads. No matter what load you ae using shot placement has far more to do with getting a deer on the ground than its retained energy. Several yerars back I had a nice WT run 125 yds after a well placed shot from a 280. I tried Powerbelts at the range in my Knight Disc Elite and was not impressed with accuracy. Several friens who tried them on deer were not impressed with their performance. All I can say is try them and see.