The pellets (IMNHO) are just a gimmick. It might be nice to keep a few in a sealed, air/water tight tube in case your loose powder gets wet, or to make a quick loading second shot when you're shaking from the adrenalin dump you got taking the first shot on a monster buck or bear though. (EZ Loaders work pretty good under those circumstances too). Dropping 2 or 3 pellets down the tube takes a lot of the fun out of black powder shooting & it's WAY too expensive to use them all the time. Use the powder with confidence, but remember that it is equal to BP by VOLUME, NOT by weight.
When Banjos are outlawed, only Outlaws will have Banjos
The Bible is my lawbook. I turn the other cheek when applicable, and spend the rest of my days resisting evil at every front, until I have breathed my last breath.