The 5.6x70R KLAUS was developed around 2008 – 2009 and is a 5.6mm version of the 6x70R (SC57) which itself was a 6mm version of the 6.5x70R (GSP20). It was produced for (and possibly designed by) Bernhard Klaus of Wiederladen Klaus, Erding, Germany. (Dixon Ref. W116).