Just curious to know where you set your protein at on high carb days?
How many grams per pound of bodyweight? We all know that on normal days protein should fall between 1 and 1.5. But when you have your re-feed day for carbs, how many grams of protein do you take in?
Your title and your original post are not asking the same question.
In regards to a refeed, guidelines I have usually read are:
Protein at 1 gram/lb of body weight
Fat - as low as possible, maybe 50 grams
Carbs - Should take up the rest of your macros
Calories should be set slightly above maintenance. Remember, refeeds are used during cuts. Here is an example. If your cals are at 2000 for your cut and you weight 170 pounds, it should look something like:
2,200 cals
Protein - 170 grams (680 cals)
Fat 50 grams (450 cals)
Carb - 267.5 grams (1170 cals)
If you are simply carb cycling, hence a high carb day, I would keep protein where you keep it throughout the other days (low carb, moderate carb). Here is a good reference.
https://www.t-nation.com/diet-fat-loss/carb-cycling-codex
Are you trying to following a carb cycling plan or are you cutting a need a refeed?