You're not going to get the ball stuck down the barrel, I have seen many competitive shooters hammering a ball to get it started and then ramming with their hand down the barrel...Lead is soft, that's why it makes a good projectile, when you get the ball started, it confirms to the size of the barrel, once it does this, the patch and ball can be rammed down....
Now, you should make a 1/2 inch diameter loading stick, pin a threaded cleaning jag on one end and a handle on the other...Go to Lowe's Hardware and buy one of those screws that has wood threads on one end and #10x32 threads on the other (this should match the threaded jag)...This way, when you load that ball without powder, you have a good, stout cleaning rod to pull it back out with...Screw the machine screw threads into the cleaning jag, slide it down until it contacts the ball and then screw the wood screw into the ball a couple of turns and pull it out...
Whenever I take a new side lock shooter to the range the first thing I do is load a patch and ball without powder....You would be surprised how many aren't prepared to pull a dry ball out, this way, they learn what to do right off...
OR...If you are shooting a percussion, push the ball down to the breach, remove the nipple and put 5grs or so of powder in the drum, replace the nipple and shoot the ball out...
If you are shooting a flinter, you can do the same, just work some into the touch hole...