Pre heat grill to low heat, like you would to reverse sear a steak.
Season Bone in Ribeye with Nashville Hot Chicken Rub liberally.
Cook steak slowly over low heat till the internal temp reaches 110-115 degrees. If cooking over an open fire, flip steak every 10-15 min to ensure even cooking.
Mix Buttermilk and Hot Sauce in a large bowl, big enough for the ribeye to fit in. Remove ribeye from the heat once temp is reached, rest in the buttermilk/hot sauce mix.
Raise heat on grill to high. Heat a large, tall sided, pot with enough oil to cover the ribeye.
Once oil is at 325 degrees, mix flour and flour seasoning together. Remove ribeye from the buttermilk/hot sauce mix and coat with the seasoned flour.
Fry the steak at 325 degrees for 5-7 min. Or until desired color is achieved, the steak is already cooked on the inside.
Remove steak to a resting rack.
Take 1 cup of the used fry oil and mix in fry oil seasoning. Brush oil mix onto the steak, generously. Rest Steak.