It all depends on the gun and general range you will be hunting in, I use in most of thecap lock guns 75 - 80 grains of 3F Goex and a 320 grain lead maxi-hunter bullet or a patched round ball. ( good to about 110 yards) With my .50 cal flintlock I use 70 grains Goex 3F and a hand cast 175 grain round ball. (good to about 100 yards) With my T/C Triumph in-line I use 90 - 110 grains of Goex Pinnacle powder and Winchester 209 primers, with a 230 grain jacketed sure fire sabot (good out to about 150 yards.) I have taken deer, hogs and even coyote for years with those loads. That should give a start point but you will have to find "the sweet spot" for your gun, The best balance of range and accuracy.
100-400
60-300
1:28
Contact the maker of your rifle for their instructions. It will depend on bullet weight. Assuming you mean a .50 cal MUZZLELOADER- and not a .50 Barrett- between 75 and 90 grains of ffG black powder is an average load for a patched ball.
100-300 USD
You need the services of a gunsmith
Depends on the load
Depends on the load.
Want ad, gun shop, gun show, egunparts
hard to tell without seeing it but if it's a flintlock,in very good condition,$250-$280 seems reasonable.The one I'm thinkig of has a 29" bbl,50 cal.
No
Depends on condition and any accessories. Value range from 100-200.