Or someone like me that dam near sleeps with one in bow MZ season and I'm not bashful about reaching out and killing something at yardage made possible with conicals and lots of practice at long range .Using a harder alloy will lighten that ball a bit. Not a lot. But you have to remember the round ball is the worst shape for retaining velocity and lighter weight equals less energy. As stated above, a bow hunter's mentality goes a long way in successfully killing deer with a ball. Get close and get the ball where it needs to be.
The deer I've killed with black powder have all been inside 40 yards. There is a good possibility that people that claim a successful 200 yard shot with ball have not used a range finder.
Our (short range is 200yds)and the long is for target (700yds)so you believe what you like but I do it every Friday from May to bow season at the longso keep in mind the short ones 200 and deer know it !/Ed