What Happens to Your Halfway House Date if You Get a Shot in Federal Prison. We explain what happens to your halfway house date in federal prison if you receive a 100 series shot. If an inmate with an existing halfway house date gets a shot, they will lose their halfway house date, likely go to the SHU, and lose up to 41 days of good time. The original halfway house date is completely gone, and the inmate must go through the entire process again to get a new one, which takes 6-9 weeks. We strong