RE: New to Muzzle loading
You're talking about the BDC (bullet drop compensator) built into the scope. I think it is made for 150 grains of pellets and the 250 grain shockwave. Although I do not shoot that rig, so don't quote me on it.
Instead, go out and try it with 100 grains of powder and the shockwave. See how it shoots. That load is a good strong hunting load and would get the job done. If you're happy with the load, then good. If not get some pellets and kick that up to 150 grains if you like to beat your self up. That is one reason I never got too excited about the BDC in a scope. I have one on a centerfire rifle and have never used it.
Today for fun, I was shooting 120 grains of Pyrodex RS with a 300 grain Speer Gold dot out of my Knight Disc. I can tell you that when you push them to magnum abilities, it sure makes a difference in the way the rifle handles.
The main thing is shoot it and see what you think of it. There is alway time to experiment... Have fun shooting.