Going by past practice,of the superlights, the .243 superlight barrels are the worst for accuracy issues, the 223 less so, and the Hornet having a very good record and well liked since it doesn't heat up much at all. The .243 heats up very fast, even my 24" bull barrel is very hot after shooting 3 rounds in as many minutes, I could imagine what the pencil thin superlight barrel is like under the same conditions.
Tim