Re: What are you?
I shoot round ball pretty much for everything now and I use them for deer hunting. I want a load that is accurate with 80-100 grains in a .50 and 80 to 110 in a .54 caliber. I range shoot a lot so I do test different ball sizes, patch thickness, lubes, Swiss or Goex and 2f or 3f.
I don't really worry about energy levels as either size round ball will do the job at those velocities. I have guns for conical and bullets but don't find them as interesting to shoot and work up the load. Most any patch and ball barrel will shoot with outstanding accuracy with 80 grains of 2f and a good lube and patch but it can be fine tuned with other load components if you want. I have found that I like a .54 over the .50 for round ball as time has gone on but either does the job fine if you can shoot. Round balls need to be placed well and a good shooter has no energy issues as long as ranges are kept reasonable for open sights.
My conical and sabot flint rifle get sighted in with a good load and seldom fired again unless it's going hunting. I seldom choose those to hunt deer with though; but I don't want to part with them either. They do have more reach and they do have more energy but again I feel round balls work just fine and they are very accurate.
One thing I notice is that I take the round ball guns out to the range to shoot offhand and sometimes just plink with low charges all the time but the conical/sabot guns don't get shot much. I seldom shoot my centerfires any more as well; they get sighted in and don't get used unless going hunting. Not sure why I still keep them around.
I love a patched ball; it's very accurate, low recoil and a blast to shoot. Plenty of power with a .54 ball and the other smaller balls as well. I shoot them a lot. Components are easy to get or make and they don't require a lot of load work up. Low charges to high charges they just chug along.
Did I mention that I love shooting patched ball.