Looks like those sticks have high temp cheese mixed in. I bought the same seasoning and used the casings from their kit and wasn't thrilled on how it turned out. I was looking for more of a smaller diameter stick and the casing wasn't the best either. I was looking more of a cross between a stick and jerky. I ended up taking my smallest tubing stuffer for my meat grinder and fitting it on my jerky shooter. I have made batches with the stick seasoning and used cheddar and pepper jack cheese. Everyone that tries it really likes it.
They are still round but has more a a jerky texture. My shooter also has an option for a flatter end result but I wasn't sure how the cheese would fit thru the opening.So your method is with NO casings? I tried it once with my Jerky cannon turned out to be round jerky for me. I was using the ground venison recipe