Expertly Spiced and Glazed Roast Turkey

Name: Expertly Spiced and Glazed Roast Turkey
Ingredients: 1 (12–14 lb.) turkey, neck and giblets removed; 2 Tbsp. whole black peppercorns; 2 Tbsp. whole pink or black peppercorns; ½ cup Diamond Crystal or ¼ cup plus 1½ tsp. Morton kosher salt; 2 Tbsp. garlic powder; 2 Tbsp. onion powder; 1 Tbsp. smoked paprika; 1 Tbsp. plus ⅓ cup (packed) light brown sugar; Small handful of hardy herbs (such as sage, rosemary, bay leaves, and/or thyme); 4 garlic cloves, crushed; 2 (2x1) strips orange zest; ⅓ cup low-sodium soy sauce; ⅓ cup sherry vinegar or red wine vinegar; 6 Tbsp. neutral oil (such as vegetable, peanut, or canola); A spice mill