RE: Gonna try black powder 1st time.
I would try the patched round ball first. then if that works for you,you can try others. the pellets will most likly not fire,some will but most want.it doesn't get enough spark down the channel to set it off.
The T/C hawken I have,I use 90 grains loose pyrodex,behind a maxie ball. works great for me.
try different one's and see which works best for you. that is the fun part. playing with the new gun(to you anyway)and have fun!!!
I am not a hunter I am a whitetail population reduction specialest
remember keep your back to the sun, your knife sharp, and your powder dry.