Cook bacon in a skillet either on the stove over medium heat or grill until crispy, and drain on paper towels. Reserve.
Place feed shaft, blade, and 1/4-inch die of meat grinder in freezer until well-chilled. Meanwhile, place meat chunks on rimmed baking sheet, leaving space between each piece and place in freezer for 10 minutes until meat is firm, but not frozen.
Combine meat in large bowl and toss to combine. Pass meat through grinder twice. Form into four disks, about 2-inches tall, and 4-6 inches wide. Refrigerate until ready for use.
Prepare a grill, oil grate. Brush buns with butter, then grill until golden-brown. Reserve.
Make special sauce by combining the mayonnaise, ketchup, mustard, chopped dill pickle, and spices.
Spread 1 tablespoon sauce on top half of each grilled bun. Place 1 leaf lettuce and 2 slices tomato on top half of each bun.
Grill patties to desired doneness, and after turning patties, place a slice of the cheese on each portion. Remove from grill and top each patty with 4 bacon slices.
Place top of buns with the condiments on top of the bacon, and serve immediately.
Burgers can be prepared in a cast-iron skillet or broiled, but grilling is best!