I've finally chosen a storage method and this is the last part of my "label" to which I'm undecided...
As long as the grades are accurate it is not a problem. Many others use a coding system unique to each person. Whichever ways works best for you.
My 2x2s for World coins are labeled with the country, date, & denomination on the front. I don't include the country on my USA coins. On the back I hand-write the catalog #, date purchased, and amount paid in code. Also on the back is the material and/or silver content. Someday, I may apply a small sticker on the front with market price & grade. To answer your question, I do not have the grade written on my 2x2s.
Once it's in my collection, it stays in my collection. I enjoy the coin, not the grade either myself or a TPG slaps on it. So no, I don't write down the grades for raw coins.
I do, I write the grade for certain coins, but not all. About 25% of my raw coins are graded. Many others simply have MS, AU, or some variation of that like MS+ or AU+. My criteria is completely coin dependent as I'll write grade on the higher MS coin holders where I'm trying to find a better grade. I STRICTLY grade these coins and I'm always trying to find a raw coin to top it. I will also grade certain variety coins as certain varieties are extremely hard to find in higher grades.
addendum In my experience, heirs that inherit coin collections typically need help grading the coins to ascertain their value. Anyone can look up a value in a price guide but determining whether a coin is AU or BU requires some experience. For this reason, I believe that I should put my grade opinion on each of my raw coins. It will just make it that much easier on everyone involved when my son inherits the collection. Another important thing is to inform your heirs about the people in the industry that they can trust for guidance (and grading opinions). I have mapped-out several dealers & friends for my heirs to contact regarding different key elements in the collection. Of course, I hope to live longer than some of the dealers
I can't write the grade since my coins are in airtites. But I do write the grade in my Excel spreadsheet. This is not to say the value due to grade but more of a way for me to learn how to grade.
I give it a simple number of 1-70. I started doing this when I was a kid and I found it to be a great way to learn how to grade. At first I would look at a photograde or ANA grading standards book and assign a grade to the best of my ability. I can do it (for the most part) on my own now after thirty years.
I put a grade on all my main collection coins. If I die, I want my family to understand what they have and a grade will help them.
Look at it this way. If you do not have a way to know what you have in the coins, then if something happened to you, how will your family know the value of them. A guy in our club has all his coins marked in his code and his family knows it also. The coins he has range from the bad to the real hard ones to get in any denomination, from copper all the way to the gold. He writes book on coins. I had all my stuff on the computer, and did not list anything on the flips on my coins, so the computer died. Now some of the coins I have, I have no clue to what I paid for them. Make up some kind of simple code and leave it so your family can know later what you have in value. i have to start over and hope that I can come up with the right values. Think about it, DO IT.
