The shotgun? Well, the first thing you need to know is it's 75/25 the damn thing goes off at all. It's likely to fire significantly later than when you pull the trigger.
The guy who showed me how to load it did it this way: Place measured amount of powder in the barrel, tamp. Place wad, or 2 cards, into the barrel, tamp, making sure the wad is flat on the powder. Place measured amount of shot in barrel, tamp. Place card, again, over shot, tamp, making sure the card is flat on the powder. You mark your ramrod at proper depths so you can keep track. It was really handy to have film canisters (remember those???) with measured amounts of powder and shot prior to loading. Nowadays there's youtubes and such I'm sure with better information.
Mine is a sweet, light percussion double barrel 12. CVA I think, I haven't dug it out of the safe for a while. I've fired each barrel exactly once, at clay pigeons. It swings nice, and it needs to, because you've got to stay with the swing longer than you're used to with a cartridge gun...it goes off slowly (if it goes off at all....), and over time. Once fired, you should run a patch down it, and then repeat the loading process. My nephew had one he hunted with, and let me tell you if you've ever got into a big covey of quail you'll find yourself trying to remember which holder has powder, which shot, which pocket the wad and cards are in, what you've put in so far, with birds all around and finally stopping and dumping out the whole mess in a cacophany of blasphemy,....I haven't laughed so hard since. Rest his soul.
So for practical hunting, a muzzleloader shotgun is for most of us a curiosity, something to fire now and then. It will teach you to hold your swing ....
I've put 100's of rounds through the rifle, and roundball goes where it's aimed. 220 grain roundball is fine for deer at muzzleloader ranges. I've no real respect for the inlines, for chrissake, shotgun primers and conicals? Get a .45-70 cartridge gun why dontcha. Flintlocks are cool, but for hunting add an additional bit of uncertainty about ignition. Most muzzleloading units are late in the season, and generally either sex. You trade that for the worst weather of the year and the likelihood of fouling your piece so it doesn't fire. I always covered my percussion and nipple, and taped over the end of the barrel trying to keep snow and ice out. I got several stories of the one that got away, still.