No. South Carolina has a bad tendency to split precincts when drawing its districts so that they can get the supposed populations in them exactly equal. The readily available data by precinct simply leaves it too close to call for sure, tho Romney appears the likely winner. According to the Huffington Post, the state GOP says it won't be saying who gets the delegates for another six to nine days.
How does that even work when it comes to a house race (or, for that matter, this primary)? They have to look up your address and give you the correct ballot?
Pretty much except they do it ahead of time.
The voter rolls used at the precincts list beside your name which Congressional district (and state Senate, state House, county council, town council, and school board districts as well) so yes, if you are in a split precinct, they will check that list and use that to give you the right ballot. They also will prominently post a map showing the district lines so you can check on that. Sometimes they have had at least four different ballots at my precinct because it has been split differently for two different types of seats and the splits overlapped.
It's somewhat easier with the electronic balloting machines as the pollworker can call up the right ballot on any of the machines. One time back in the 90's I was voting at a precinct that was using the old lever machines, and they had to set up three different pairs of machines for the three different ballots, with lines of people waiting to use two of the types and no line for the third as there were only a few people who had that combination.
