I googled SC concealed weapons permit for you
and what I found was the application. I forgot to get a link, it is easy enough for you to find. It says that it will take 90 days to process the application. You probably also need to take a couyrse beforehand and those can take a little while to get into. It may or may not take the full 90 days to get approved. In Maine they 30 days to approve or reject. The last several times that I have been in to renew they tell me that it could take up to 3 months. I smile and nod and walk out the door. Usually 2 or three days before the 30 days is up I call in to make sure that it is going to be ready. When they tell me that it might take longer, I tell them that according to the law, and I cite the section, that they have to have it ready within the 30 days. Usually, I get a call the same or next day letting me know that it is ready. Remember, depending on your state laws, they have to give a reason for denial. Insisting that they adhere to the law as you have to is not a legitimate reason to rejcted.
Search out a course and they will answer all your questions for you.