I usually run a dry patch to get any excess oil out and shoot my first shot which is always off to foul the barrel. After the 1st shot to foul the barrel, my next shots are where they are suppose to be and after about the 3rd, they stay consistent. For hunting, I usually stop at a public range on the way and shoot 3 - 5 shots and then hunt the rest of the week with it fouled. Muzzleloader season is only a week long here.
I'm using BH209, 350 gr. FPB's, and STS primers out of an Omega if your wondering.