Make the brine by whisking hot water and kosher salt until is dissolved.
Cool the water down by adding ice until cool.
Squeeze lemon juice into water and add the rinds. Stir in the peppercorns.
Place turkey in water, cover and refrigerate for at least 4 hours and up to 24.
Remove turkey and discard brine. Pat turkey pat dry with paper towels and place on a baking sheet.
In a bowl, combine smoked paprika, brown sugar, garlic, oregano, dry mustard, pepper, cumin and salt.
Mix with softened butter.
Rub butter mixture between the skin, over the outside of the turkey and inside the cavity.
Prepare grill or smoker to about 250- 300° with hickory or pecan.
Cook turkey for about 15- 20 minutes per pound with the grill closed until internal temperature reaches 160°.
Remove from grill and allow to rest 15 minutes before slicing.