Just a few tips:
1: Use only REAL Black Powder in the flintlock. I suggest Goex or Scheutzen. Use the same powder for the flashpan as for the main charge. You load from a Powder Measurer, NOT from the flask or horn .
2: Use Tom Fuller Black English Flints. You can acquire them from TOW, Log Cabin, October Country, etc.
3: Don't plan on hunting deer season if it is only a couple of weeks away. You need to learn the rifle, find a load, etc, well, unless you have every day off to shoot it for the next two weeks. Finding a load is something that takes time & ettort & documentation. Sometimes it takes me 4-5 trips to the range to find it, some times it takes me Dozens of trips, just according to how good I want the rifle to shoot. The rifle will shoot as good as the time you put in it.
4: Do all of the test load works off Sandbags on a solid Bench. You need to find the load the rifle likes best & then learn to shoot it. Anyone can shoot a percussion, not just anyone can accurately shoot a flintlock, as they are a whole different animal & it takes time to adjust.
5: Start your loads with about 60 grains of 2F of BP, with a .490 ball, some prelubed patches of .015 & some Natural Lube 1000. Shoot 3, change targets & WRITE ON THE TARGET ALL THE DATA !!!!!!!, go up 5 grains, & shoot 3, change targets go up 5 grains & shot 3, etc. This MAY get ya going if the gun likes the combo & just Maybe you can have a decent load for a 50 yard shot by deer season. If you cannot group a 3" group of 3 consistanty at 50 yards by deer season, you simply don't have a load & you are wasting the deer as too much chance of wounding one & not finding it. Yu find the load THEN ya move the sights.
This is not like using a 12 ga slug where you can blow a hole anywhere & the deer will bleed all over the place. Shot placement is Critical on a 50 RB and it must be in the heart/lungs cavity if you plan on finding the deer. Shoot on in the leg or gutsor thick meat & I have seen some shot in the meat of the neck & the dang deer can go for a mile & will go straight to heavy brush most likely & really hard to find at times. Because of the twist of that barrel, I would not go past 90 grains.
6: When ya find a load, you may want to try some 3F in the rifle also & do the test loads all over .
7: Swab between shots will most likely be beneficial in reloading.
8: Buy a brass or SS range rod with a bore guide. (See above venders) This will keep ya from breaking the wooden RR at the range in case you get too hefty on it. Some guy uses a brass on when hunting.
9: When ya hunt, make sure you have a lil screw on T handle or RR extension in your bag just in case, a cleaning jag, ball puller, patch worm, breech scraper. IF your rifle has a patent breech you will need a 36 cal scraper for that also that is rounded on the end of the blade. T/C makes one or you can buy a regular .36 cal breech scraper & round it.
10: Be prepared to dryball it & also to have a ball stuck in it. If you shoot it much this Will happen, just a matter of time.
11: I suggest you buy the Lyman Black Powder Handbook. LOTS of good infor in there & well worth the $ for it, especially for a newbie.
Good Luck
Birddog6