Brokennock
Cannon
Maybe try some cereal box cardboard punched to a diameter Very slightly larger than the measurement from bottom of rifling groove to bottom of rifling groove. Then/or maybe try some fiber automotive gasket material of you can't find the wads I'm referring to.
These seem close, but from the (admittedly poor quality) picture, they look a little thicker than what I was using.
https://www.buffaloarms.com/50-caliber-030-512-vegetable-fiber-walters-wads-bag-of-1000-wal512030
These seem close, but from the (admittedly poor quality) picture, they look a little thicker than what I was using.
https://www.buffaloarms.com/50-caliber-030-512-vegetable-fiber-walters-wads-bag-of-1000-wal512030