Only use natural casings here but perhaps simmer in some water to get to temp then just brown them a bit.
Dried sheep casings
Used some dried sheep casings today for the first time. Soak them in warm water for about 15 or 20 seconds. Then put them on the stuffing tube that I sprayed with white oil. The casings are about 20 to 25 mm was happy with the results. Much cheaper than the fresh may try them for A batch of snack sticks. I do not hang my snack sticks just lay them on the grates. Will let you know how they turned out.