Check your barrels.

[Kmaddock]

Totally can relate to this
I have had 3 fully loaded weapons in my collection
2 were easy enough to get ball and charge out of

The brown bess was a lot more troublesome
I had to weld a wood screw to a steel bar
hammer bar and screw into lead ball (carefully with nothing delicate in front of barrel)
then twist rod to dig screw into lead ball and remove the rod + ball

wish i kept the ball but interestingly the powder under it flashed quiet well when match applied.

Keep safe and this is how I rectified my issue. I am not recommending it to anyone as the prefect method.

Ken