I've been unable to find blocks of Swiss cheese at my local grocery store for the past month, so I've been substituting whole milk high moisture mozzarella. I've not tried any of the resultant cheese yet, but the cheddar, provolone, and mozzarella combo is much easier to work with than the cheddar, provolone, and Swiss. Due to the higher moisture content, it comes together more easily during the process, pours more easily into the loaf pan, and still has some bounce to it once it firms up. The cheddar, provolone, and Swiss version firmed up like a brick.
The recipe, for approximately 3.5 lbs of cheddar, provolone, and mozzarella Provel:
204 grams heavy whipping cream
40 grams sodium citrate
18 grams fine sea salt
16 ounces Cabot white cheddar
16 ounces Galbani whole milk high moisture mozzarella
~16 ounces (some times a little more, some times a little less, depends on the exact package weights they have available) sliced provolone from the deli counter (not sure the brand, probably either Boar's Head or Deitz and Watson)
10 grams liquid smoke
I don't weigh the cheese, I just go by the weights on the packages, assuming truth in labeling. I weigh everything else though. I find it easier to melt the mozzarella first, then move to the cheddar and the provolone.
I'll use some of this batch for the first time this weekend, so I'll some pictures showing how it turned out. There's something about the cheddar, provolone, and Swiss combo that I've made previously that doesn't replicate the cheese found on St. Louis style pizza. It doesn't have that creamy/soupy quality once baked that is a hallmark of St. Louis style (in my opinion). I'm hoping this mozzarella version will be closer.