Then paper ctgs. with powder and ball after that. I have found they shoot to the same poi as patched round balls, with the same hunting load in both, however, the ball was a mere .008" smaller than the bore and there was 2 thicknesses of paper, each side. The paper ctg. around the ball made for quite a snug fitting in the muzzle, but I could load and fire an aimed second shot in 8 seconds after the first shot. This, of course, including re-capping the nipple. I used a leather wheel capper than carries 24 caps around it's periphery.
Thanks for reminding me of the paper ctg's. Bruce. They are indeed a God-send for large bore muzzleloading rifles, especially if hunting in freezing weather, when normal patch lubes become stiff.
Bruce's site has pictures and methods, if he cares share that.